Maintaining the same posture for a long time, such as sitting with crossed legs or resting on your wrists, can compress local nerves, causing numbness in the hands and feet.
A lack of vitamins B12, B1 (thiamine), and B6 can cause nerve damage, leading to numbness or tingling in the hands and feet.
Diabetes is a common cause of numbness in the hands and feet. Prolonged high blood sugar levels can damage nerves, leading to diabetic neuropathy.
Spinal issues such as cervical spondylosis or lumbar disc herniation can compress nerve roots, causing numbness and pain in the affected areas.
Poor blood circulation, such as atherosclerosis or blood clots, can reduce blood supply to the limbs, causing numbness and a feeling of coldness.
Long-term heavy drinking or side effects from certain medications can also cause nerve damage, leading to numbness in the hands and feet.