There are many causes of medial thigh pain, most of which are caused by injury to the muscles attached to the medial femur, or by the accumulation of lactic acid in the muscles due to heavy activity, resulting in soreness. At the same time, medial thigh pain can also be caused by some disease factors, such as tumor compression of the femoral nerve, which generates impulses from the nerve to the brain to produce pain. Therefore, if you have inner thigh pain, you should go to the hospital as soon as possible for consultation and treatment.