External cyst anus
The anus is an opening in the lower part of the digestive tract. When stool fills the rectum, the sphincter muscle relaxes, letting stool pass through the anus and out of the body. The external anal sphincter closes off the anus when stool has passed. Lumps that form around the anus — for a variety of reasons — can cause it to feel hard. There may also be swelling, pain , and discharge. The anus is comprised of skin and internal intestinal tissue, which consists of mucus glands, blood vessels, lymph nodes, and sensitive nerve endings.
Abscess and Fistula Expanded Information | ASCRS
An anorectal abscess also referred to as an anal abscess, rectal abscess, perianal abscess, or perirectal abscess depending on its location is a pus-filled cavity that forms within the furrows of the anal canal called the anal sinuses. As your body tries to control the infection, white blood cells killed in the battle and other bodily fluids start to collect in the tissue, forming a pocket of pus. Abscesses can form near or within the anus or develop much higher up in the rectum itself. While an abscess can form spontaneously for no apparent reason, it is commonly associated with gastrointestinal disease, bowel irregularities, immune suppression, and even certain medications. Anorectal abscesses are usually first recognized because of dull, throbbing pain in the anus or rectum, often accompanied by sharp pain when defecating. Perianal abscesses "peri-" meaning around are the most common type and can usually be identified visually as they occur in the upper layers of tissue.
An Unusual Perineal Swelling: A Cyst Between the Sphincters
Pimples tend to be skin problems most associated with the face, though they can form on your back, pubic area, and just about anywhere on the body — including the anus. That can lead to infection and other complications. The bump you feel may also be a different health concern, including a hemorrhoid or a cyst that will require treatment by a healthcare professional. There are different types of pimples, including pustules , which are small raised pink or red bumps that contain pus. Larger papule -like bumps embedded in the skin are called nodules , while larger, pus-filled lumps are called cysts.
The anus is that part of the intestinal tract that passes through the muscular canal of the pelvis and anal sphincters. It is the final orifice through which stool passes out of the body. In adults, the anus is 4 to 5 centimeters long. The lower half of the anal canal has sensitive nerve endings. There are blood vessels under the lining, and in its mid portion there are numerous tiny, anal glands.