Leg cramps can be caused by cold, overwork, calcium deficiency and other reasons. 1. Cold: If you are in a cold environment for a long time and wearing too few clothes, the local blood vessels will contract, resulting in abnormal spasm of the muscle tissues, which will cause the phenomenon of leg cramps all the time. 2. Overwork: When the leg muscles are overworked due to prolonged standing, walking, running, etc., which causes the leg muscles to strain, it will lead to the symptom of leg cramps. 3. Calcium deficiency: when the body needs less calcium, muscle excitability increases, causing abnormal muscle spasms, manifested as symptoms of foot cramps. Causes of foot cramps are more reasons, when there are uncomfortable symptoms, should go to the hospital in time to check, clear the cause of the disease to give formal treatment.