Causes of Numbness in the Hands and Feet

Numbness — a loss of normal sensation, sometimes with tingling or a "pins and needles" feeling — in the hands or feet has causes ranging from completely harmless to signs of an underlying condition needing treatment.

Temporary, Harmless Causes

Sitting or sleeping in a position that puts pressure on a nerve is the most common cause of brief numbness, resolving quickly once the pressure is relieved.

Nerve Compression

Conditions like carpal tunnel syndrome (compression of a nerve at the wrist, common with repetitive hand use) cause numbness in specific, predictable areas of the hand, often worse at night.

Diabetes-Related Nerve Damage

Peripheral neuropathy from long-standing or poorly controlled diabetes is one of the most significant causes of chronic numbness, typically starting in the feet and progressing upward in a "stocking and glove" pattern — this is a key reason blood sugar control matters for long-term nerve health, not just for its more immediate effects.

Other Causes

Vitamin B12 deficiency, poor circulation (including from smoking or peripheral artery disease), certain medications (some chemotherapy drugs), alcohol overuse, and, less commonly, autoimmune or thyroid conditions can all cause numbness through different mechanisms.

When to See a Doctor

See a doctor for numbness that's persistent, recurring, spreading, or accompanied by weakness, difficulty walking, or loss of bladder/bowel control — the last combination, especially if sudden, needs urgent evaluation.