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Hand and wrist MediBilbao Salud

Why Your Hands Go Numb While Sleeping and How to Stop It

Waking up with numb, tingling or «dead» hands is common, and shaking the hands usually brings the feeling back within a minute or two. Occasional episodes are often caused by sleeping position, but if it happens most nights, the most likely cause is carpal tunnel syndrome, a compression of a nerve at the wrist. Neck problems and other nerve conditions can also be responsible. This guide explains, from a physiotherapy point of view, the causes, what helps and when nerve tests are useful.

Topic
Physical therapy
Updated
Reading time
5 minutes
Reviewed by
Dr. Itziar Gotxi Erezuma · Medical doctor (ENT) · Bizkaia Medical Association no. 484809757

Why hands go numb at night

Nerves need a good blood supply and room to glide. When a nerve is compressed or stretched for a long time, its signals slow down and you feel numbness, tingling or pins and needles. At night we stay still for long periods, often with the wrists curled or the arms above the head, and fluid shifts can increase pressure inside narrow tunnels such as the carpal tunnel.

Common causes

  • Sleeping position: wrists bent, lying on the arm, arms under the pillow or above the head.
  • Carpal tunnel syndrome: compression of the median nerve at the wrist, with numbness in the thumb to ring finger, often at night; see carpal tunnel symptoms.
  • Cubital tunnel syndrome: compression of the ulnar nerve at the elbow when it stays bent, with numbness in the little and ring fingers.
  • Neck problems: a trapped nerve in the neck causes numbness with neck and arm pain; see neck pain from sleeping.
  • Thoracic outlet syndrome: compression near the collarbone, worse with arms raised.
  • Peripheral neuropathy from diabetes, alcohol, vitamin B12 deficiency or some medicines, usually affecting both hands and feet.

Who is more likely to have it

  • People with repetitive hand use or vibrating tools.
  • Pregnancy, due to fluid retention.
  • Diabetes, an underactive thyroid and rheumatoid arthritis.
  • Being overweight.
  • Previous wrist fractures.
  • Age over 40.

Which fingers are numb: a useful clue

  • Thumb, index, middle and half the ring finger: median nerve, usually carpal tunnel.
  • Little finger and half the ring finger: ulnar nerve, usually at the elbow.
  • Thumb and index with neck pain: a nerve root in the neck.
  • All fingers of both hands and the feet: peripheral neuropathy.

Many people say the whole hand is numb, so it helps to check which fingers are affected the next time it happens.

What helps at night

  • Wrist splint: a splint that keeps the wrist straight at night is the first treatment for carpal tunnel syndrome and often reduces symptoms within weeks.
  • Keep elbows straighter: avoid sleeping with the arms fully bent or hands under the head; a towel loosely wrapped around the elbow can help.
  • Pillow: support the neck in a neutral position and avoid putting the arm under the pillow.
  • Position: try sleeping on your back with arms by your sides or on a pillow.
  • Shake and move: shaking the hands and moving the fingers restores sensation during an episode.

Exercises and daytime habits

  • Nerve gliding exercises for the median nerve, guided by a physiotherapist.
  • Tendon gliding exercises for the fingers.
  • Regular breaks from typing, phone use and gripping.
  • Keep wrists neutral when typing and avoid resting them on hard edges.
  • Neck and shoulder posture exercises if the neck is involved.

Nerve tests and treatment

If numbness persists, a doctor or physiotherapist examines sensation, strength and specific provocation tests. Nerve conduction studies and electromyography (EMG) measure how well the nerves conduct and confirm the site and severity of compression. They are particularly useful before surgery or when the diagnosis is unclear. Treatment for carpal tunnel syndrome includes splints, steroid injections and, when symptoms are severe or there is weakness, a minor operation to release the nerve. Blood tests check for diabetes, thyroid problems and vitamin deficiencies.

When to see a doctor

  • Numbness that happens most nights or is present during the day.
  • Weakness, dropping things or difficulty with buttons.
  • Wasting of the muscles at the base of the thumb.
  • Numbness in both hands and feet.
  • Sudden numbness or weakness of one side of the body, face drooping or speech problems: call emergency services.

Numb hands during pregnancy

Carpal tunnel symptoms are common in the second and third trimesters because fluid retention increases pressure in the wrist. Wrist splints at night, raising the hands on a pillow and gentle hand exercises usually help, and symptoms often improve after birth.

Key points to remember

  • Occasional numbness is often due to sleeping position.
  • Regular night-time numbness in the thumb to ring finger suggests carpal tunnel syndrome.
  • A night wrist splint and position changes help most people.
  • Persistent numbness or weakness needs nerve tests.

Questions about hands going numb while sleeping

These answers are general information and do not replace an examination or individual medical advice.

Is it normal for hands to go numb while sleeping?

Occasionally, yes, due to position. Numbness most nights suggests a nerve compression such as carpal tunnel syndrome.

Why do both of my hands go numb at night?

Carpal tunnel syndrome often affects both hands. Neuropathy, pregnancy and thyroid problems are other causes.

Does a wrist brace help numb hands at night?

Yes. A splint that keeps the wrist straight is an effective first treatment for carpal tunnel syndrome.

Can a pillow cause hand numbness?

Sleeping with the arm under the pillow or the neck bent can compress nerves.

Should I worry about hand numbness at night?

See a doctor if it is frequent, present in the day, or with weakness or muscle wasting.

What test checks for carpal tunnel syndrome?

A clinical examination, and nerve conduction studies with EMG when needed.

Sources

  1. NHS · Carpal tunnel syndrome
  2. NHS · Pins and needles
  3. NHS · Peripheral neuropathy
  4. NHS · Cervical spondylosis

This guide is for general information and does not replace medical advice. How a problem is diagnosed and treated depends on your examination and medical history. If you think you have an emergency, contact your local emergency services.