The causes of calf stomach cramps are mainly the following: 1, calf gastrocnemius muscle strain: mostly seen in the recent large number of physical activities or physical activities beyond the limit of physical fitness, may cause calf gastrocnemius muscle injury, will lead to the accumulation of lactic acid in the calf stomach, thus causing spasmodic pain in the calf stomach, also known as calf stomach cramps. 2, calcium deficiency: calcium ions can inhibit the excitability of the neuromuscular junction, when When calcium deficiency nerve muscle joints excitability will increase, often appear calf muscle twitching, spasm, etc., and in the night calf cramps will be more serious. After the above symptoms appear, make sure to go to the hospital for blood calcium testing. If it is clear that there is a decrease in blood calcium, you must actively take clinical calcium supplements to correct the low blood calcium situation, so that the symptoms of calf cramps can be relieved.