What is the cause of fhand numbness?

Several causes.: Hand numbness is usually related to a problem with the nerves. There can be a pinch on the nerve in the wrist (carpal tunnel syndrome) or a pinch on the nerves as they come down into the arm from the neck (radiculopathy). Discuss your symptoms with your doctor.

Many possibilities: Numbness can occur from various reasons. Some potential causes include vitamin deficiency, nerve damage, nerve compression, alcohol over consumption, side effects of different medications, or as a result of different systemic medical conditions such as diabetes. Get evaluated by a professional to determine the diagnosis. Treatment is based on the diagnosis.