Fistula is not likely to occur in the groin, only for severe fistula, may lead to inguinal lymph node swelling. Anal fistula is a relatively common anorectal disease, in the early stages of the onset of the patient’s anus and rectum around the bacterial infection, and gradually formed a swollen mass, some patients may be broken on their own, and then need to be treated with anti-infective. Some patients need surgery to remove the lesion. Fistula is a disease of the anus and does not occur in the groin. If the groin area is accompanied by pain and other uncomfortable symptoms, it may be due to the fistula has been seriously infected, invasion of the lymphatic system, resulting in lymph node enlargement in the groin area and other symptoms. Patients may also be accompanied by fever, fatigue and other phenomena. Anus fistula, should be timely to the regular hospital, complete the examination, according to the condition of the corresponding treatment, so as not to cause adverse consequences.