Colitis - Describe Your Experience

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What is colitis?

Colitis is inflammation of the inner lining of the colon and can be associated with diarrhea, abdominal pain, bloating, and blood in the stool. This inflammation may be due to a variety of reasons, including the following:

  • infection,
  • loss of blood supply to the colon,
  • inflammatory bowel disease, and
  • invasion of the colon wall with lymphocytic white blood cells or collagen.

Anatomy of the colon

The colon, or large intestine, is a hollow, muscular tube that processes waste products of digestion from the small intestine, removes water and ultimately eliminates the remnants as feces (stool) through the anus. The colon is located within the abdominal cavity, the sac that contains the intestine.

The colon is surrounded by many layers of tissue. The innermost layer of the colon is the mucosa that comes into contact with the waste products of digestion. is The mucosa absorbs water and electrolytes back into the blood vessels that are located just below the surface in the submucosa. This is surrounded by a circular layer of muscles and then another outer layer of longitudinal muscles that run along the length of the colon. The muscles work together to help rhythmically squeeze liquid waste from the cecum through the entire length of the colon. Water is gradually removed, turning the waste into formed stool, so that it is excreted out of the anus in solid form.

The colon frames the organs within the peritoneum and its segments are named based on their location.

  • The colon begins in the right lower quadrant of the abdomen, where the terminal ileum, the last part of the small intestine, attaches to the cecum, the first segment of the colon. The appendix is attached to the cecum.
  • The ascending colon begins at the cecum and arises from the right lower abdomen to the right upper abdomen near the liver.
  • The colon then makes a sharp left turn called the hepatic flexure (hepatic=liver), and is referred to as the transverse colon, as it makes its way to the left upper quadrant of the abdomen near the spleen.
  • There is a sharp downward turn called the splenic flexure, and it is referred to as the descending colon as it runs from the left upper quadrant to the left lower quadrant of the abdomen.
  • When it descends into the pelvis, it is referred to as the sigmoid colon.
  • The last several centimeters of the colon are referred to as the rectum.
  • The anus is the final portion of the colon.

Picture of the Large Intestine or Colon
Picture of the Large Intestine or Colon

Return to Colitis

See what others are saying

Comment from: babsy998, 55-64 Female (Patient) Published: June 30

I was diagnosed with infectious colitis in 1998 and then microscopic (both types). I have times where I do feel better but then I go backwards and have abdominal pain with bloody mucus, loose stools that fill the entire bowl. It is something I hope you never have to experience. I was hospitalized a few times as my body was exhausted. I was going to the bathroom 40 times a day at one point! Medicines don't seem to do much and I am just so tired of it all!

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Comment from: Jamivers, 55-64 Female (Patient) Published: October 01

I have had 2 colitis attacks, both with similar symptoms. I would get a sudden urge to make a bowel movement. But both times I wasn't home and as the minutes passed, I got light headed, dizzy, sweaty, and hot, with labored breathing, eventually passing out. Then I would bleed every time I felt like I had to make a bowel movement, after the initial diarrhea. I had gas pains in the stomach. A very frightening experience. I wish I knew what to do to avoid these episodes!

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