What could be some causes for my hand numbness?

Carpal Tunnel Syndro: Most numbness in the hand is from pressure on the median nerve at the wrist causing carpal tunnel syndrome. Most patients will have intermittent numbness at first, often at night or while reading or driving. Other causes can be cubital tunnel syndrome, diabetic neuropathy or other forms of neuropathy.

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.