The causes of frequent hand cramps may be related to hand muscles, hand bones and blood calcium levels. Long hours of work or hands-on activities can lead to strain on the hand muscles, which can easily lead to inflammation of the hand muscles and cramps when there are no hand activities, and cramps and pain can also occur in slightly strained hands after getting cold. When there is local osteoporosis or bone aging in the hands, the blood circulation through the hands will not be smooth, especially in older people, there will be regular pain and cramps in the wrists of the hands. When the blood calcium level is low, the low calcium content cannot inhibit the inward flow of sodium ions, so action potentials involving sodium ions can occur for a long period of time, which eventually leads to continuous electrical stimulation of the muscles, resulting in muscle contraction and artificially perceived hand cramps.