Muscle cramps in the thighs may be related to the following causes: 1. They may be caused by overexertion. The fact that many patients do some intense activities, especially after running and jumping, may lead to excessive fatigue of the muscles of the thighs, resulting in continuous cramps, also known as cramps. 2. It may be caused by cold. There are many patients who often wear shorter trousers during long-distance running, which causes sudden cold in the thigh area, so that long-term activities may cause muscle cramps in the thigh area. 3, may be caused by neurological lesions. If there is a central nervous system lesion, such as epilepsy, when the seizure occurs, it may lead to muscle twitching in the thigh area. If there is a peripheral nervous system lesion, such as a spinal cord or nerve root lesion, it may also cause muscle twitching in the thigh area. When a patient has a twitch in this area, the first thing to do is to straighten the lower limb and apply gentle massage to the twitching area and, if necessary, apply heat. If there is no relief after such treatment, it is important to seek prompt consultation with an orthopaedic surgeon.