Thigh root pain may be caused by physiological reasons such as exertion, or by pathological reasons such as trauma, lymphadenitis and hip joint lesions. 1. Physiological causes: metabolite accumulation or muscle spasm caused by exertion or incorrect posture can cause thigh root soreness. 2. Trauma: due to pulling, excessive exercise and other causes of thigh root muscle, fascia and other tissues of the injury, may appear thigh root soreness, swelling and other symptoms. 3. Lymphadenitis: Inflammation of inguinal lymph nodes due to bacterial, viral and other pathogenic infections can cause thigh root pain. 4. Hip joint lesions: such as hip arthritis, hip dysplasia, femoral head necrosis and other diseases, can cause thigh root pain. Thigh root pain may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.