Clinical symptoms of soreness in the left thigh: 1. Ask the patient whether there is strenuous activity or a state of strain within a short period of time, these can appear soreness. 2. There is also the lesion of lumbar disc herniation and spinal stenosis, which can lead to the appearance of soreness in the limbs of the distributed segments, if there is a protrusion in the attachment of the 3rd-4th lumbar segment, it will form the symptoms of soreness around the left thigh. 3. If there is a protrusion of the attachment of the 3rd-4th lumbar vertebral segment, it will lead to the symptoms of soreness around the left thigh. 4, there are also some vascular lesions of the left thigh, such as stasis of veins, poor reflux, or blockage of arteries, ischemic changes, which will cause the symptoms of localized soreness in the left thigh. Therefore, if the symptoms of left thigh pain appear, it is recommended to take active bed rest, brake the leg, and do not go to the ground. If the symptoms are not significantly relieved within a short period of time, it is recommended to go to the hospital for consultation.