The symptoms of frequent shaking of the feet when a man falls asleep, if accompanied by leg cramps, may be related to calcium deficiency, may also be related to lower limb arterial ischemia. If there are protruding veins in the legs, it may be related to varicose veins in the lower limbs, etc. If the temperature in the room is too low, or if you do not pay attention to keeping warm or exposing your legs when you sleep, you may also experience shaking symptoms. Frequent shaking of the legs while sleeping and numbness may be related to lumbar disc herniation and other diseases. If there are symptoms such as twitching of the limbs or foaming at the mouth, it may be related to epilepsy. People suffering from ischemic cerebrovascular disease and chronic alcoholism may also experience similar symptoms, so you can go to the hospital for relevant examinations to determine the diagnosis before treatment.