Severe pain in the groin on movement may be caused by over-exercise, inguinal lymphadenitis, femoral hernia and other factors. 1. Excessive exercise: Excessive exercise can lead to excessive accumulation of lactic acid in the muscles at the groin, which manifests itself as pain and soreness, and the symptoms worsen when you are active. 2. Inguinal lymphadenitis: this disease is mainly caused by bacterial and viral infections, the lymph nodes in the groin will be swollen and painful, and the pain will be aggravated by pulling the lymphatic tissues during activities. 3. femoral hernia: the hernia sac protrudes through the femoral ring to the groin, the patient will have a feeling of swelling and pain, activity will lead to increased abdominal pressure, pain is obvious. There are many factors that cause groin pain to be severe when you move, so it is recommended that the patient consult a doctor in a timely manner to identify the cause of the disease and then carry out the relevant treatment.