The pain in the groin of the thigh of the patient may be caused by trauma, inguinal lymphadenitis, femoral head necrosis and other reasons. 1. Trauma: due to the patient’s thigh groin suffered trauma, may cause muscle strain, causing thigh groin pain phenomenon. 2. Inguinal lymphadenitis: Inguinal lymphadenitis can be caused by bacterial infection, low immunity, etc., and the patient will experience pain in the groin. 3. Necrosis of the femoral head: due to trauma, alcohol stimulation and other causes of necrosis of the femoral head, the patient will appear in the hip joint, the proximal side of the thigh, knee pain, hip activity is limited, the phenomenon of thigh groin pain. When patients appear thigh groin pain phenomenon, it is recommended to seek medical treatment in time, diagnosed by a professional doctor, and given reasonable treatment.