Numbness in hands is a warning sign of many dangerous diseases.

Carpal tunnel syndrome

The carpal tunnel is a narrow passageway formed by connective tissue and small bones in the palm of the hand. Tendons and nerves pass through it.

Carpal tunnel syndrome is a condition in which the tunnel is inflamed or narrowed, causing pressure on the nerves inside due to constant hand and finger movements over a long period of time. It causes numbness in the fingers, hands, and even makes you stiff and difficult to grasp objects.

Give your hands a break if you don’t want to get this syndrome. See a doctor if your hand numbness is frequent and doesn’t go away. It can cause permanent damage to nerves and muscles if left untreated.

Neuralgia

If the cartilage, muscles or tendons put too much pressure on the nerve, it will not be able to function properly and that is the cause of numbness. This condition occurs regularly and can cause arthritis, wear and tear of the cartilage, calcification of the spine or the formation of tumors on the spine.

People should not be subjective when they often have symptoms of numbness in the hands, forearms or fingers, which is a warning sign of many dangerous diseases.

Symptoms may include: Sharp or burning pain, pins and needles sensation, arm weakness, numbness.

Migraine with aura

Some migraines have auras or flashes of light that can affect your vision and other senses, including numbness in your hands.

Arm numbness usually begins within an hour and lasts less than an hour. Other symptoms of this migraine include:

- Changes in vision or loss of vision, including blind spots.

- Seeing zigzag lines, rays of light, or stars.

- Muscle weakness.

- Difficulty speaking or expressing.

Diabetes

High blood sugar can cause diabetic neuropathy – damage to the nerves.

The condition usually begins with numbness in both legs or hands along with other symptoms including:

- Itching or feeling like insect bites.

- Pain or cramps.

- Increased sensitivity to touch (the weight of clothing or bed linens may cause pain).

- Muscle weakness.

- Loss of reflexes, especially in the ankles.

- Serious foot problems such as ulcers, infections and bone and joint pain.

There is no cure for the disease, but doctors can prescribe medications to relieve symptoms.

Neurological diseases

Nerve conditions such as multiple sclerosis can also cause numbness in your hands or feet. If you notice numbness in your hands or feet or have trouble with speech or concentration, see your doctor for evaluation and treatment.

Side effects of chemotherapy

Some types of cancer chemotherapy can cause nerve damage that leads to numbness or tingling and pain in your arms, legs, fingers, toes, or other areas of your body. It can feel like you're wearing a thick, tight glove.

Stroke

A stroke occurs when a blood vessel carrying blood to the brain bursts or becomes blocked by a blood clot. In addition to numbness in the arms or legs, a stroke can cause weakness, confusion, difficulty seeing, difficulty speaking, etc.

Heart attack

Although other signs of a heart attack (such as chest pain, shortness of breath, and cold sweats) are more common than numbness in the hands, if this happens frequently, you're also at risk for heart disease.