Thigh groin pain may be caused by hip joint disorders, or it may be caused by urinary and reproductive disorders. 1. Hip joint disease: thigh groin clinically known as the groin, groin area pain is most commonly hip joint lesions, may be due to long-term strain, repeated activities resulting in hip impingement syndrome; may also be due to ischemic changes in the femoral head of the femoral head caused by necrosis; may also be due to the degenerative lesions of the hip joint caused by osteoarthritis. 2. Urinary and reproductive system diseases: the groin area is rich in blood vessels, lymphatic and other tissues, when the urinary and reproductive system infection or lesions, may lead to inguinal lymph nodes appear enlarged, stimulate the peripheral nerve root pain, common diseases, such as urinary tract infection, female vaginitis, adnexitis, and so on. Thigh groin pain may also have other causes, such as inguinal lymphadenitis. If the pain is not relieved, it is recommended to go to the hospital in a timely manner, complete the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.