The common reasons for twitching hands and feet while sleeping are as follows: 1, low calcium: after middle age, most of them have calcium loss leading to low calcium twitching, mainly showing twitching of hands and feet, which can also occur if they are children. Children because of the growing body, so the demand for calcium is relatively large, but also because of low calcium can cause twitching of hands and feet; 2, cold: cold after causing muscle spasms, can also be manifested as twitching of hands and feet; 3, epilepsy: performance is not only twitching of hands and feet, there may be a whole body twitching. If twitching of hands and feet occurs during sleep, you should go to the hospital to check whether it is caused by low calcium or has epilepsy problems. If there is an epilepsy problem, go to the neurology department for targeted treatment. The most common clinical cause of convulsions caused by low calcium is also the cause of most of the convulsions, so it is necessary to take calcium supplements, in addition to eating more foods with high calcium content and getting more sunlight to promote calcium absorption. If the elderly can also use drugs to promote calcium deposition to reduce the occurrence of convulsions.