If there are symptoms of soreness in the area where the hip and thigh are connected, it is more likely to be caused by a herniated lumbar disc, because a herniated lumbar disc can compress the sciatic nerve and radiate to the hip and lower limbs, which can easily cause pain or numbness and discomfort, and it is necessary to do CT or MRI examination of the lumbar area for clarification. If you have a herniated disc, you need to do physical therapy or traction for the lumbar area, and you can also do hot compresses and physical therapy for the buttocks and thighs. If the symptoms are severe, minimally invasive surgical treatment should be considered. The common surgical options are radiofrequency ablation surgical treatment, closure treatment or needle knife treatment. It may also be caused by simple local sterile inflammation, which is related to factors such as cold and fatigue.