What causes numbness in the hands during sleep?

Generally, numbness in the hands during sleep may be caused by poor sleeping posture, transient ischemia, local cold exposure, carpal tunnel syndrome, cervical spondylosis, or other reasons. It is recommended to seek medical attention promptly and receive treatment under the guidance of a physician. Specific analysis is as follows:

1. Poor Sleeping Posture

When the arm is compressed or bent for prolonged periods during sleep, local blood circulation may become impaired, leading to hand numbness. Adjusting sleeping posture and avoiding prolonged pressure on the arms can help prevent this.

2. Transient Ischemia

If the arm is compressed during sleep, blood flow may be restricted, causing temporary ischemia in the hand and resulting in a sensation of numbness. Regularly changing sleeping positions helps avoid prolonged pressure on the same area.

3. Local Cold Exposure

During sleep, if the hands are exposed to a cold environment, local blood vessels may constrict, impairing circulation and causing hand numbness. Keep hands warm by wearing gloves or using heating pads and other warming aids.

4. Carpal Tunnel Syndrome

Frequent, repetitive, or forceful wrist movements can trigger carpal tunnel syndrome, which may compress the median nerve and cause hand numbness—often worsening at night. Symptoms may include hand pain and reduced grip strength. Under medical supervision, medications such as indomethacin tablets, prednisolone acetate injection, and procaine hydrochloride injection may be used for treatment.

5. Cervical Spondylosis

Cervical spondylosis results from degenerative changes in the cervical intervertebral discs and cervical bone spurs. During sleep, improper posture or unsuitable pillow height may exacerbate hand numbness, accompanied by symptoms such as neck stiffness, dizziness, and nausea. Treatment should follow medical advice and may include medications such as ibuprofen sustained-release tablets, mecobalamin tablets, and Jinfukang granules.

In daily life, regularly changing sleeping positions, maintaining warmth, avoiding prolonged hand use, and gently moving the arms or performing massage can help promote blood circulation.