Category - anal
The external anal sphincter measures about 8 to 10 cm in length, from its anterior to its posterior extremity, and is about 2. 5 cm opposite the anus, when defecation occurs the sphincter muscle retracts. Fissures a fissure is a tear in the anal canal that can be very painful. Fistulae a fistula is an abnormal channel between two parts of the body, such as the anus and the skin. Swelling in the anal sphincter ulcers an ulcer is a hole or sore in the lining of a structure, such as the anal muscles. Anal herpes anal sex may spread the herpes viruses hsv-1 and hsv-2. Symptoms include painful sores around the anus that come and go. An anal fissure is a small tear or crack in the lining of the anus. If you experience severe pain or bright red bleeding during or after bowel movements, you may have an anal fissure. Sphincter muscle, any of the ringlike muscles surrounding and able to contract or close a bodily passage or opening. One of the most important human sphincter muscles is the sphincter pylori, a thickening of the middle layer of stomach muscle around the pylorus (opening into the small intestine) that holds food in the stomach until it is thoroughly mixed with gastric juices. Proctalgia fugax, a variant of levator ani syndrome, is a severe, episodic pain in the regions of the rectum and anus. It can be caused by cramping of the levator ani muscle, particularly in the pubococcygeal part.