The causes of lateral thigh muscle soreness are as follows: 1, acute muscle strain: for example, when performing strenuous sports, there is a lateral femoral muscle injury or strain of the broad fascia tensor muscle, it will be manifested as soreness of the anterior lateral thigh or lateral thigh muscles. 2, chronic muscle strain: this is mainly caused by prolonged physical activity or overload sports, such as people who often mountaineering, or picking up a burden. The main reason for this is that it is very easy to cause muscle strain in the thighs, which can be manifested as soreness and pain in the thighs. 3, neuropathic pain: for example, the anterior lateral femoral nerve is stuck, which can be manifested as soreness and skin sensation abnormalities in the lateral thighs, such as numbness and painful pinprick-like sensation of the skin.