An anal fissure is a break, or tear, in the mucous membrane lining of the anus. The anus is the opening at the end of the digestive tract where stool leaves the body. A fissure is caused primarily by constipation, which leads to straining to pass large hard stools trauma caused by insertion of objec. Anal gland secretes lymphal discharge and built up fecal matter from the colon lining. In some animals this gland expungement can be done routinely every 24 36 months to prevent infection and fistula formation. The perianal space surrounds the anal canal below the white line. A mucous membrane or mucosa is a membrane that lines various cavities in the body and covers the surface of internal organs. It consists of one or more layers of epithelial cells overlying a layer of loose connective tissue, sometimes accompanied by a thin mucousal muscle layer, which separates the mucosa from the submucosa. It is mostly of endodermal origin and is continuous with the skin at. Anal fissure slitlike separation of anal mucosa that lies below the dentate line. Majority (70 to 80) are in the posterior midline region anterior midline lesions (10 to 20) are more common in women. Mucus is a slimy, slippery fluid that acts as a lubricant and protects various structures in the body. There are a number of mucus-secreting cells in the body, but mucus is most prominent in the respiratory, genital and gastrointestinal tracts, notes the university of colorado at boulder 1. When the gastrointestinal tract becomes infected or undergoes frequent irritation, the mucus-secreting. the rectal lining consists of glistening red tissue containing mucus glandsmuch like the rest of the intestinal lining. The lining of the rectum is relatively insensitive to pain, but the nerves from the anus and nearby external skin are very sensitive to pain. diagnoses a-z anal fissure symptoms, causes & treatment options. An anal fissure is a break or tear in the mucous membrane lining of the anus that will likely result in symptoms of pain and bleeding during and after a bowel movement, discomfort with urination, and a visible tear in the anus that may have a foul-smelling discharge. Rectal discharge is intermittent or continuous expression of liquid from the anus (). Otherwise, this is closely related to types of fecal incontinence (e. Fecal leakage) but the term rectal discharge does not necessarily imply degrees of incontinence. Types of fecal incontinence that produce a liquid leakage could be thought of as. Anal fissures an anal fissure is an injury affecting the stretch of the anal canal that causes a tear in the lining of the anus. This can result in bleeding during bowel movement and discharge of mucus or pus-like fluid from the anus.