Hidden pain in the right thigh root triangle of men mostly refers to hidden pain in the inner groin, and the common causes are trauma, femoral head necrosis, hip synovitis, inguinal hernia, prostate cancer and so on. 1. Trauma: pain can be produced when the soft tissue of the inner groin is damaged or even the pubic bone is fractured due to external force. 2. Necrosis of the femoral head: the blood circulation of the femoral head deteriorates due to trauma, alcoholism, long-term hormone use and other reasons. Aseptic necrosis of the femoral head occurs, resulting in pain. 3. Hip synovitis: aseptic inflammation that occurs in the hip joint of human body, mostly related to excessive exercise, soft tissue injury and other factors, because of the stimulation of inflammatory factors, can produce pain. 4. Inguinal hernia: because of the decrease in the strength of the abdominal wall or the increase in the pressure of the abdomen, causing the organs and tissues in the abdominal cavity to protrude outward in the weak part of the groin, a lump can be seen in the groin, which is mostly accompanied by pain. 5. Prostate cancer: malignant tumor occurring in prostate, common symptoms include perineal pain, difficulty in urination. There are more reasons for the hidden pain in the inner groin, and it may also be related to hip impingement, ankylosing spondylitis, hip arthritis and other diseases. If the symptoms continue to be unrelieved, it is recommended to consult a doctor in time to clarify the cause of the disease, and to carry out targeted treatment.