Why Does My Hand Feel Numb? Causes and Solutions

Why Does My Hand Feel Numb? Experiencing numbness in your hand can be unsettling, and understanding the potential causes is the first step toward finding relief. WHY.EDU.VN is here to provide clarity on the various reasons behind hand numbness, from nerve compression to underlying health conditions, and guide you towards effective solutions for paresthesia. Explore insights into nerve entrapment, peripheral neuropathy, and learn when to seek professional medical advice for carpal tunnel syndrome and other underlying medical conditions.

1. Understanding Hand Numbness: An Overview

Hand numbness, also known as paresthesia, is an abnormal sensation that can manifest as tingling, prickling, or a complete loss of feeling in the hand. This sensation arises due to disruptions in the sensory nerve signals traveling from the hand to the brain. It’s a common symptom with a wide range of potential causes, some benign and temporary, others indicative of a more serious underlying issue. Recognizing the nuances of your symptoms is key to identifying the root cause and seeking appropriate treatment. Ignoring persistent or worsening hand numbness could lead to long-term complications, emphasizing the importance of addressing the issue promptly.

2. Common Causes of Hand Numbness

Several factors can contribute to the sensation of numbness in your hand. These causes range from temporary nerve compression to chronic underlying medical conditions. Let’s delve into some of the most prevalent reasons:

2.1. Carpal Tunnel Syndrome

Carpal Tunnel Syndrome (CTS) is a condition that occurs when the median nerve, which runs from your forearm into your hand, becomes compressed at the wrist. This compression can result in numbness, tingling, weakness, and pain in the hand and fingers, particularly the thumb, index, middle, and part of the ring finger.

Several factors can contribute to the development of CTS, including:

Repetitive hand motions: Activities like typing, assembly line work, or using vibrating tools can inflame the tendons in the carpal tunnel, leading to nerve compression.
Wrist anatomy: Some people have smaller carpal tunnels, making them more prone to nerve compression.
Underlying health conditions: Conditions like diabetes, rheumatoid arthritis, and thyroid disorders can increase the risk of CTS.
Pregnancy: Hormonal changes during pregnancy can cause swelling, which may compress the median nerve.

Symptoms of CTS typically start gradually and worsen over time. You may experience numbness or tingling that comes and goes, often at night. As the condition progresses, you may notice weakness in your hand, difficulty gripping objects, and pain that radiates up your arm.

2.2. Ulnar Nerve Entrapment (Cubital Tunnel Syndrome)

Ulnar nerve entrapment, also known as cubital tunnel syndrome, occurs when the ulnar nerve, which runs along the inside of your elbow and into your hand, becomes compressed or irritated. This compression can cause numbness, tingling, and weakness in the little finger and part of the ring finger.

The ulnar nerve can be compressed at several points along its path, including:

The cubital tunnel: This is a narrow passageway on the inside of your elbow.
The Guyon’s canal: This is a tunnel in the wrist.

Factors that can contribute to ulnar nerve entrapment include:

Leaning on your elbow for prolonged periods: This can put pressure on the ulnar nerve.
Repetitive elbow movements: Activities like throwing a baseball or using a hammer can irritate the nerve.
Arthritis: Arthritis in the elbow can narrow the space around the ulnar nerve.
Trauma: A direct blow to the elbow can damage the ulnar nerve.

Symptoms of ulnar nerve entrapment typically develop gradually. You may experience numbness or tingling in your little finger and part of your ring finger, especially when your elbow is bent. As the condition progresses, you may notice weakness in your hand, difficulty gripping objects, and pain that radiates up your arm.

2.3. Radial Nerve Compression

Radial nerve compression occurs when the radial nerve, which travels down the arm and controls movement and sensation in the hand and wrist, is squeezed or pinched. This can lead to numbness, tingling, pain, and weakness in the hand, wrist, and forearm.

The radial nerve can be compressed at various locations, including:

The axilla (armpit): Compression here can result from crutches or prolonged arm positioning.
The spiral groove of the humerus (upper arm bone): Fracture or pressure on the arm can cause compression.
The elbow: Repetitive movements or external pressure can compress the nerve.
The forearm: Compression can occur due to tight muscles or structures.

Factors that can contribute to radial nerve compression include:

Repetitive motions: Repeated arm and wrist movements, such as twisting or gripping, can cause compression.
Prolonged pressure: Leaning on the elbow or arm for extended periods can squeeze the nerve.
Trauma: Injuries like fractures or dislocations can damage the radial nerve.
Underlying medical conditions: Conditions like tumors, cysts, or inflammation can put pressure on the nerve.

Symptoms of radial nerve compression vary depending on the location and severity of the compression. Common symptoms include:

Numbness or tingling in the back of the hand, thumb, and fingers
Pain in the forearm, elbow, or wrist
Weakness in the wrist and fingers, leading to difficulty with gripping or lifting objects
Wrist drop, where the wrist cannot be extended properly

2.4. Peripheral Neuropathy

Peripheral neuropathy refers to damage to the peripheral nerves, which transmit information between the central nervous system (brain and spinal cord) and the rest of the body. This damage can disrupt sensory signals, leading to numbness, tingling, pain, and weakness in the hands and feet.

Several factors can cause peripheral neuropathy, including:

Diabetes: High blood sugar levels can damage nerves over time.
Autoimmune diseases: Conditions like rheumatoid arthritis, lupus, and Guillain-Barré syndrome can cause nerve inflammation and damage.
Infections: Viral or bacterial infections, such as shingles, Lyme disease, and HIV, can affect the nerves.
Vitamin deficiencies: Lack of certain vitamins, such as B12, B6, and E, can lead to nerve damage.
Exposure to toxins: Chemicals, heavy metals, and certain medications can damage nerves.
Trauma: Injuries to the nerves can cause neuropathy.
Inherited disorders: Some people inherit genetic conditions that cause neuropathy.

Symptoms of peripheral neuropathy vary depending on the type and severity of nerve damage. Common symptoms include:

Numbness or tingling in the hands and feet
Sharp, burning, or shooting pain
Increased sensitivity to touch
Muscle weakness
Loss of coordination
Difficulty walking
Loss of balance

2.5. Thoracic Outlet Syndrome

Thoracic outlet syndrome (TOS) is a condition that affects the space between your collarbone and your first rib (thoracic outlet). In TOS, the blood vessels and nerves in this space can become compressed, leading to pain, numbness, tingling, and weakness in the shoulder, arm, and hand.

There are three main types of TOS:

Neurogenic TOS: This is the most common type and involves compression of the brachial plexus, a network of nerves that controls movement and sensation in the arm and hand.
Vascular TOS: This type involves compression of the blood vessels in the thoracic outlet, either the subclavian artery or the subclavian vein.
Arterial TOS: Compression of the subclavian artery.
Venous TOS: Compression of the subclavian vein.
Disputed TOS: Some controversy around its existence, symptoms similar to neurogenic but without clear nerve compression.

Factors that can contribute to TOS include:

Anatomical defects: Some people are born with extra ribs or abnormal muscles that can compress the nerves and blood vessels in the thoracic outlet.
Poor posture: Slouching or hunching over can narrow the space in the thoracic outlet.
Repetitive arm movements: Activities like swimming, throwing, or lifting heavy objects can irritate the nerves and blood vessels in the thoracic outlet.
Trauma: Injuries to the shoulder or neck can cause TOS.
Pregnancy: Hormonal changes during pregnancy can cause swelling, which may compress the nerves and blood vessels in the thoracic outlet.

Symptoms of TOS vary depending on the type of TOS and the structures that are being compressed. Common symptoms include:

Pain in the shoulder, neck, arm, or hand
Numbness or tingling in the fingers or hand
Weakness in the arm or hand
Coldness or discoloration of the hand or fingers
Swelling in the arm or hand
Aching pain or heaviness in the arm or hand

2.6. Cervical Spondylosis (Arthritis of the Neck)

Cervical spondylosis, commonly known as arthritis of the neck, is a degenerative condition that affects the vertebrae, discs, and ligaments in the cervical spine (neck). As these structures break down over time, they can put pressure on the spinal cord and nerve roots, leading to pain, stiffness, numbness, and weakness in the neck, shoulders, arms, and hands.

The primary cause of cervical spondylosis is age-related wear and tear. As we age, the discs in our spine gradually lose their water content and become less flexible. This can lead to disc herniation or bone spurs, which can compress the spinal cord and nerve roots.

Factors that can contribute to cervical spondylosis include:

Age: The risk of cervical spondylosis increases with age.
Genetics: Some people are genetically predisposed to developing cervical spondylosis.
Occupation: Jobs that involve repetitive neck movements or heavy lifting can increase the risk of cervical spondylosis.
Smoking: Smoking can accelerate the degeneration of spinal discs.
Obesity: Excess weight can put extra stress on the spine.
Previous neck injury: A previous neck injury can increase the risk of cervical spondylosis.

Symptoms of cervical spondylosis vary depending on the severity of the condition and the structures that are being affected. Common symptoms include:

Neck pain and stiffness
Headaches
Numbness or tingling in the shoulders, arms, or hands
Weakness in the arms or hands
Difficulty with coordination
Loss of balance
Bowel or bladder dysfunction (in severe cases)

2.7. Raynaud’s Phenomenon

Raynaud’s phenomenon is a condition that affects blood flow to the fingers and toes. In Raynaud’s, exposure to cold or stress causes the small blood vessels in the extremities to spasm, restricting blood flow. This can lead to numbness, tingling, pain, and color changes in the affected areas.

There are two main types of Raynaud’s phenomenon:

Primary Raynaud’s: This is the most common type and is not associated with any other underlying medical condition. The cause of primary Raynaud’s is unknown, but it is thought to be related to an oversensitivity of the blood vessels to cold or stress.
Secondary Raynaud’s: This type is caused by an underlying medical condition, such as autoimmune diseases (e.g., lupus, rheumatoid arthritis), scleroderma, or blood vessel disorders.

Factors that can trigger Raynaud’s phenomenon include:

Cold temperature: Exposure to cold air or water is the most common trigger.
Stress: Emotional stress can also trigger Raynaud’s.
Smoking: Nicotine can constrict blood vessels.
Certain medications: Some medications, such as beta-blockers and decongestants, can trigger Raynaud’s.

Symptoms of Raynaud’s phenomenon typically occur in episodes. During an episode, the fingers or toes may turn white, then blue, and finally red as blood flow returns. The affected areas may also feel numb, tingling, or painful.

2.8. Vitamin B12 Deficiency

Vitamin B12 is an essential nutrient that plays a vital role in nerve function, red blood cell production, and DNA synthesis. A deficiency in vitamin B12 can lead to a variety of neurological symptoms, including numbness and tingling in the hands and feet.

Vitamin B12 deficiency can occur for several reasons, including:

Dietary deficiency: Vitamin B12 is primarily found in animal products, such as meat, poultry, fish, eggs, and dairy. Vegans and vegetarians who do not supplement with B12 are at risk of deficiency.
Malabsorption: Certain medical conditions, such as pernicious anemia, Crohn’s disease, and celiac disease, can interfere with the body’s ability to absorb vitamin B12 from food.
Medications: Some medications, such as metformin and proton pump inhibitors, can reduce vitamin B12 absorption.
Age: As we age, our ability to absorb vitamin B12 decreases.

Symptoms of vitamin B12 deficiency can develop gradually and may include:

Numbness and tingling in the hands and feet
Fatigue
Weakness
Difficulty walking
Memory problems
Depression
Sore tongue

2.9. Ganglion Cyst

A ganglion cyst is a noncancerous, fluid-filled lump that typically develops near joints or tendons in the hand or wrist. While the exact cause of ganglion cysts is unknown, they are thought to arise from small joint or tendon injuries that cause tissue to bulge out.

Ganglion cysts can vary in size and may feel firm or spongy. They are usually painless, but if a cyst presses on a nerve, it can cause pain, numbness, tingling, or weakness in the affected area.

2.10. Vasculitis

Vasculitis is a group of disorders that involve inflammation of the blood vessels. This inflammation can damage the blood vessels, leading to a variety of symptoms, including numbness and tingling in the hands and feet.

Vasculitis can affect blood vessels of any size and in any part of the body. The symptoms of vasculitis vary depending on the type of vasculitis and the blood vessels that are affected. Common symptoms include:

Fever
Fatigue
Weight loss
Muscle aches
Joint pain
Skin rashes
Numbness and tingling in the hands and feet
Headaches
Vision problems

3. Less Common Causes of Hand Numbness

While the causes listed above are the most common, there are several less frequent reasons why you might experience numbness in your hand:

3.1. Brain and Nervous System Conditions

Rarely, numbness in the hand can be a symptom of a more serious underlying condition affecting the brain or nervous system. These conditions include:

Stroke: A stroke occurs when blood flow to the brain is interrupted. This can cause a variety of symptoms, including numbness, weakness, paralysis, speech problems, and vision problems.
Multiple sclerosis (MS): MS is an autoimmune disease that affects the brain and spinal cord. It can cause a wide range of symptoms, including numbness, tingling, muscle weakness, fatigue, vision problems, and balance problems.
Brain tumor: A brain tumor can put pressure on the brain and nerves, leading to a variety of symptoms, including numbness, headaches, seizures, and changes in personality.
Spinal cord tumor: A spinal cord tumor can put pressure on the spinal cord and nerves, leading to a variety of symptoms, including numbness, weakness, and bowel or bladder dysfunction.

It’s important to note that numbness alone is not usually associated with potentially dangerous disorders, such as strokes or tumors. However, if you experience numbness accompanied by other neurological symptoms, such as weakness, loss of function, severe headache, or changes in vision, it’s crucial to seek immediate medical attention.

3.2. Trauma or Overuse Injuries

Injuries to the arm, wrist, or hand can damage nerves and cause numbness. Examples include:

Brachial plexus injury: The brachial plexus is a network of nerves that runs from the spinal cord to the shoulder, arm, and hand. Injuries to the brachial plexus can occur from falls, sports injuries, or car accidents.
Fractures: A broken bone in the arm or wrist can damage nerves and cause numbness.
Dislocations: A dislocated joint in the arm or wrist can also damage nerves.
Repetitive strain injuries: Overuse of the hand and wrist can lead to inflammation and nerve compression, causing numbness.

3.3. Chronic Conditions

Certain chronic conditions can also cause numbness in the hands. These include:

Diabetes: As mentioned earlier, diabetes can cause peripheral neuropathy, which can lead to numbness in the hands and feet.
Rheumatoid arthritis: Rheumatoid arthritis is an autoimmune disease that causes inflammation of the joints. This inflammation can compress nerves and cause numbness.
Lupus: Lupus is another autoimmune disease that can affect the nerves and cause numbness.
Hypothyroidism: Hypothyroidism is a condition in which the thyroid gland does not produce enough thyroid hormone. This can lead to nerve damage and numbness.

3.4. Infectious Diseases

Some infectious diseases can also cause numbness in the hands. These include:

Lyme disease: Lyme disease is a bacterial infection that is transmitted by ticks. It can cause a variety of symptoms, including numbness, fatigue, headaches, and joint pain.
Shingles: Shingles is a viral infection that causes a painful rash. The virus can also affect the nerves and cause numbness.
HIV/AIDS: HIV/AIDS can damage the nerves and cause numbness.

3.5. Treatment Side Effects

Certain medical treatments can also cause numbness in the hands as a side effect. These include:

Chemotherapy: Chemotherapy drugs can damage the nerves and cause peripheral neuropathy.
HIV drugs: Some HIV drugs can also cause peripheral neuropathy.

4. Identifying the Cause: Diagnosis and Evaluation

To determine the underlying cause of your hand numbness, a thorough medical evaluation is essential. This typically involves:

Medical history: Your doctor will ask detailed questions about your symptoms, including when they started, what makes them better or worse, and any other medical conditions you have.
Physical examination: Your doctor will examine your hand, wrist, arm, and neck to assess your range of motion, strength, sensation, and reflexes.
Neurological examination: This examination assesses your nerve function and can help identify the location and extent of nerve damage.

In addition to the physical and neurological examinations, your doctor may order additional tests to help confirm the diagnosis. These tests may include:

Nerve conduction studies (NCS): These tests measure the speed at which electrical signals travel along your nerves. They can help identify nerve damage and determine the severity of nerve compression.
Electromyography (EMG): This test measures the electrical activity of your muscles. It can help identify muscle damage and nerve problems.
Imaging tests: X-rays, MRI, or CT scans may be used to visualize the bones, joints, and soft tissues in your hand, wrist, arm, and neck. These tests can help identify arthritis, bone spurs, tumors, or other abnormalities that may be causing nerve compression.
Blood tests: Blood tests may be ordered to check for underlying medical conditions, such as diabetes, vitamin deficiencies, autoimmune diseases, or infections.

5. Treatment Options for Hand Numbness

The treatment for hand numbness depends on the underlying cause. Here are some common treatment approaches:

5.1. Conservative Treatments

For mild to moderate cases of hand numbness, conservative treatments may be sufficient to relieve symptoms. These treatments include:

Rest: Avoid activities that aggravate your symptoms.
Ice: Apply ice packs to the affected area for 15-20 minutes at a time, several times a day.
Heat: Apply heat to the affected area to relax muscles and improve blood flow.
Over-the-counter pain relievers: Medications like ibuprofen or naproxen can help relieve pain and inflammation.
Wrist splints: Wearing a wrist splint, especially at night, can help keep your wrist in a neutral position and reduce pressure on the median nerve.
Physical therapy: A physical therapist can teach you exercises to strengthen your hand and wrist muscles, improve your range of motion, and reduce nerve compression.
Ergonomic adjustments: Make changes to your workstation or activities to reduce repetitive motions and improve your posture.

5.2. Medications

In some cases, medications may be necessary to manage the symptoms of hand numbness. These medications may include:

Corticosteroids: These medications can reduce inflammation and swelling around the nerves. They can be taken orally or injected into the affected area.
Pain relievers: Prescription pain relievers may be necessary to manage severe pain.
Nerve pain medications: Medications like gabapentin or pregabalin can help relieve nerve pain.

5.3. Surgery

If conservative treatments and medications are not effective, surgery may be necessary to relieve nerve compression. Common surgical procedures include:

Carpal tunnel release: This surgery involves cutting the ligament that is compressing the median nerve in the carpal tunnel.
Ulnar nerve decompression: This surgery involves releasing the pressure on the ulnar nerve at the elbow or wrist.
Thoracic outlet decompression: This surgery involves removing or repositioning the structures that are compressing the nerves and blood vessels in the thoracic outlet.

5.4. Alternative Therapies

Some people find relief from hand numbness through alternative therapies, such as:

Acupuncture: This traditional Chinese medicine technique involves inserting thin needles into specific points on the body to stimulate healing.
Chiropractic care: Chiropractors use spinal adjustments and other techniques to relieve nerve compression and improve overall health.
Massage therapy: Massage can help relax muscles, improve blood flow, and reduce nerve compression.
Yoga: Certain yoga poses can help stretch and strengthen the muscles in the hands, wrists, and arms, which may reduce nerve compression.

6. Prevention Strategies to Avoid Hand Numbness

While not all causes of hand numbness can be prevented, there are steps you can take to reduce your risk:

Maintain good posture: Proper posture can help prevent nerve compression in the neck and shoulders.
Avoid repetitive motions: If your job or hobbies involve repetitive hand motions, take frequent breaks to stretch and rest your hands.
Use proper ergonomics: Make sure your workstation is set up correctly to reduce strain on your hands and wrists.
Maintain a healthy weight: Obesity can put extra stress on the spine and nerves.
Manage underlying health conditions: If you have diabetes, arthritis, or another chronic condition, work with your doctor to manage your condition and prevent nerve damage.
Avoid smoking: Smoking can damage blood vessels and nerves.
Eat a healthy diet: A balanced diet rich in vitamins and minerals can help keep your nerves healthy.
Stay active: Regular exercise can improve blood flow and reduce nerve compression.

7. When to Seek Medical Attention

While occasional hand numbness may not be a cause for concern, it’s important to seek medical attention if you experience any of the following:

Numbness that is severe or persistent
Numbness that is accompanied by weakness, pain, or loss of function
Numbness that is spreading to other parts of your body
Numbness that is interfering with your daily activities
Numbness that is accompanied by other neurological symptoms, such as headache, vision problems, or speech problems

Ignoring these symptoms could lead to delayed diagnosis and treatment, potentially resulting in permanent nerve damage.

8. The Role of WHY.EDU.VN in Answering Your Health Questions

Navigating the complexities of health information can be overwhelming. At WHY.EDU.VN, we strive to provide accessible, reliable, and expert-backed answers to your health questions. Our platform offers:

Comprehensive information: We cover a wide range of health topics, including the causes, symptoms, diagnosis, and treatment of hand numbness.
Expert insights: Our content is reviewed by medical professionals to ensure accuracy and clarity.
User-friendly format: We present information in a clear and concise manner, making it easy to understand complex medical concepts.
Interactive Q&A: Our platform allows you to ask questions and receive personalized answers from experts.
Community support: Connect with others who are experiencing similar health issues and share your experiences.

9. Real-Life Scenarios and Examples

To illustrate the various causes and treatments for hand numbness, let’s consider a few real-life scenarios:

Scenario 1: A 45-year-old office worker experiences numbness and tingling in her thumb, index, and middle fingers, especially at night. She is diagnosed with carpal tunnel syndrome and finds relief with wrist splints, ergonomic adjustments, and physical therapy.
Scenario 2: A 60-year-old man with diabetes experiences numbness and burning pain in his feet and hands. He is diagnosed with peripheral neuropathy and manages his symptoms with medication, lifestyle changes, and regular checkups with his doctor.
Scenario 3: A 30-year-old athlete experiences numbness and weakness in his arm and hand after a shoulder injury. He is diagnosed with thoracic outlet syndrome and undergoes physical therapy and surgery to relieve nerve compression.

These examples highlight the importance of seeking a proper diagnosis and following a personalized treatment plan to manage hand numbness effectively.

10. Latest Research and Developments in Hand Numbness

The field of hand numbness research is constantly evolving, with new studies and developments emerging regularly. Some recent areas of focus include:

Advanced imaging techniques: Researchers are developing new imaging techniques to better visualize nerve compression and damage.
Minimally invasive surgical procedures: Surgeons are exploring less invasive techniques to relieve nerve compression, which can lead to faster recovery times and fewer complications.
Novel drug therapies: Scientists are developing new drugs to treat nerve pain and promote nerve regeneration.
Regenerative medicine approaches: Researchers are investigating the use of stem cells and other regenerative medicine techniques to repair damaged nerves.

Staying informed about the latest research and developments can empower you to make informed decisions about your health and treatment options.

FAQ: Frequently Asked Questions About Hand Numbness

Q1: Is hand numbness always a sign of a serious medical condition?

A: Not always. Hand numbness can be caused by a variety of factors, some benign and temporary, others indicative of a more serious underlying issue.

Q2: What are the most common causes of hand numbness?

A: The most common causes include carpal tunnel syndrome, ulnar nerve entrapment, radial nerve compression, and peripheral neuropathy.

Q3: When should I see a doctor for hand numbness?

A: Seek medical attention if you experience numbness that is severe, persistent, accompanied by weakness or pain, spreading, interfering with daily activities, or accompanied by other neurological symptoms.

Q4: How is hand numbness diagnosed?

A: Diagnosis typically involves a medical history, physical examination, neurological examination, and possibly nerve conduction studies, EMG, imaging tests, or blood tests.

Q5: What are the treatment options for hand numbness?

A: Treatment options include conservative treatments (rest, ice, heat, splints, physical therapy), medications, surgery, and alternative therapies.

Q6: Can I prevent hand numbness?

A: While not all causes can be prevented, you can reduce your risk by maintaining good posture, avoiding repetitive motions, using proper ergonomics, maintaining a healthy weight, managing underlying health conditions, avoiding smoking, and eating a healthy diet.

Q7: Is there a cure for carpal tunnel syndrome?

A: Carpal tunnel syndrome can often be effectively treated with conservative measures or surgery, depending on the severity.

Q8: Can vitamin deficiencies cause hand numbness?

A: Yes, deficiencies in vitamins like B12 can lead to nerve damage and numbness.

Q9: What is thoracic outlet syndrome?

A: Thoracic outlet syndrome involves compression of nerves and blood vessels in the space between the collarbone and first rib, leading to pain, numbness, and weakness in the shoulder, arm, and hand.

Q10: Where can I find reliable information about hand numbness?

A: WHY.EDU.VN provides comprehensive, expert-backed information about hand numbness and other health topics.

Experiencing hand numbness can be concerning, but understanding the potential causes and available treatments can empower you to take control of your health. Remember, early diagnosis and appropriate management are key to preventing long-term complications.

Are you struggling to find answers to your health questions? Do you need expert guidance and support? Visit WHY.EDU.VN today to ask your questions and connect with our team of medical professionals. We are here to provide you with the information and resources you need to make informed decisions about your health. Contact us at 101 Curiosity Lane, Answer Town, CA 90210, United States. Whatsapp: +1 (213) 555-0101. Website: why.edu.vn.