Anus tailbone swelling considerations may be suffering from hemorrhoids, anal fistula or proctitis caused by the specifics of the recommendations to the hospital for examination and diagnosis, to avoid delaying the condition. 1. hemorrhoids: hemorrhoids is due to the venous plexus of the anal canal or the lower end of the rectum is congested or bruised and enlarged, usually manifested as bleeding, perianal itching, pain, and prolapse and other symptoms, which makes the patient appear anus tailbone swelling feeling. 2. Anal fistulitis: anal fistulitis is an inflammatory reaction of the anal fistula tissue lesions, poor dietary habits and lifestyle habits can trigger the disease, usually show perianal swelling, burning sensation, resulting in the patient has a feeling of anal caudal bone swelling. 3. Proctitis: proctitis is due to bacterial infection or autoimmune disease caused by acute and chronic inflammation of the rectal area, mainly manifested as diarrhea, anxiousness and heaviness (lower abdomen is uncomfortable, want to relieve the stool, defecation after a sense of incompletion), bloody stool, defecation pain and anus falling sensation, the patient will produce the feeling of anal caudal bone swelling. Causes of anus caudal bone swelling more causes, the specific causes need to go to the hospital in time for diagnosis, clear causes should be actively cooperate with the doctor to carry out targeted treatment, to avoid the deterioration of the development of the condition.