Lateral thigh tendon pain may be caused by strenuous exercise, may also be the symptomatic manifestation of certain diseases, such as fasciitis, lumbar disc herniation, etc., should be promptly consulted to identify the cause of the disease. 1. Strenuous exercise: normal people after strenuous exercise, the body can produce a large amount of lactic acid, which can lead to muscle soreness, resulting in the phenomenon of lateral thigh tendon pain, generally through rest, leg massage after the symptoms can be relieved, but usually should be avoided excessive exercise. 2. Fasciitis: the thigh fascia is subjected to cold, humid climate, chronic strain, trauma and other stimuli to pathological changes, resulting in muscle, fascia pain, muscle tension, skin numbness and other symptoms, and in severe cases, can also lead to movement disorders. 3. Lumbar intervertebral disc herniation: due to different degrees of degenerative changes in various parts of the lumbar intervertebral disc, under the action of external factors, it can lead to the stimulation or compression of the adjacent spinal nerve roots, thus causing lumbar pain, and one side of the lower limbs or both lower limbs pain, numbness and other symptoms. There are other causes of tendon pain in the outer thigh, such as trauma, etc. If you do not get relief after resting, you should go to the hospital in time to improve the relevant examination, to clarify the cause of the disease, and then the doctor will carry out targeted treatment, so as not to delay the condition.