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The most common causes of hand or finger cramps or spasms are muscle spasm, diabetes, and carpal tunnel syndrome.Other possible causes, such as multiple sclerosis, are more rare.ithin all the people who go to their doctor with hand or finger cramps or spasms, 47% report having hand or finger pain, 34% report having foot or toe cramps or spasms, and 34% report having leg cramps or spasms. 1  Hand or finger pain 47. 2  Foot or toe cramps or spasms strong predictor 34. 3  Headache 34.
Acute causes of hand cramps. Hand cramps can also be caused by acute problems that affect the muscles and nerves of the hand including: Anxiety or panic due to hyperventilation.Damage to a single nerve or nerve group (mononeuropathy) or to multiple nerves (polyneuropathy) that are connected to muscles in the hand.uestions for diagnosing the cause of hand cramps. To diagnose your condition, your doctor or licensed health care practitioner will ask you several questions related to your hand cramps including: Health Stories: Read how this real patient found the right care.