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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.
Photo Credit Photodisc/Photodisc/Getty Images. Cramps that occur in the fingers have a variety of causes. For example, overusing the fingers during activities such as writing, playing instruments or typing, can cause muscle fatigue and unwanted spasms that interfere with normal motor performance.tep 2. Stretch your fingers to relieve cramping and increase muscle flexibility in the hands. For example, hold your hand parallel to the floor and use the index finger on your other hand to gently lift each finger upward for five seconds before releasing.