What is the function of the sigmoid colon in the digestive system
Dylan Hughes
Published Feb 20, 2026
sigmoid colon, a terminal section of the large intestine that connects the descending colon to the rectum; its function is to store fecal wastes until they are ready to leave the body. The sigmoid colon derives its name from the fact that it is curved in the form of an S (Greek sigma: σ).
What happens if sigmoid colon is removed?
However, because part of your colon was removed, you may experience loose stools for several days or even months. This is normal and will resolve after the remaining colon does the job of absorbing water. Being up and about after surgery is also helpful in regulating bowel function.
What is sigmoid colon?
The sigmoid colon is the terminal portion of the large intestine before reaching the rectum. It connects the descending colon with the rectum. The sigmoid colon derives its name from a Greek letter sigma.
Can you live without a sigmoid colon?
Although it is an amazing organ, it is possible to live without a colon. People have portions of their colon removed in surgery every day—surgical bowel resection is one of the treatment options for colon cancer.What can go wrong with the sigmoid colon?
“Obstruction of the sigmoid colon by mass or cancer can lead to difficulty having bowel movements despite laxatives, and if severe enough, can also result in abdominal pain, nausea, and vomiting.”
Which side is sigmoid colon on?
The left side of the colon has four sections: the descending colon, the sigmoid colon, the rectum, and the anus.
What side of your body is your sigmoid colon on?
The ascending colon travels up the right side of the abdomen. The transverse colon runs across the abdomen. The descending colon travels down the left abdomen. The sigmoid colon is a short curving of the colon, just before the rectum.
What causes inflammation of the sigmoid colon?
Infections, poor blood supply, and parasites can all cause an inflamed colon. If you have an inflamed colon, you’ll likely have abdominal pain, cramping, and diarrhea.Where does feces go when constipated?
In most cases, as food moves through your colon, the colon absorbs water while it makes stool. Muscle movements (contractions) push the stool toward your rectum. When the stool gets to the rectum, most of the water has been soaked up. The stool is now solid.
How long does it take to recover from a sigmoid colectomy?You may return to work after you feel healthy, usually 1 to 2 weeks after laparoscopic repair and 2 to 3 weeks for open procedures. You will not be able to lift anything over 10 pounds, climb, or do strenuous activity for 4 to 6 weeks following surgery.
Article first time published onDoes the sigmoid colon absorb nutrients?
By the time digested food reaches the sigmoid, most of the nutrients have already been extracted by the stomach and small intestines, but the sigmoid can extract water and vitamins from the feces while it’s waiting to be expelled.
What is a sigmoid colectomy?
Sigmoid Colectomy is the name given to the operation to remove the diseased part of your bowel. The operation can be done in two ways. It can either be performed in the traditional method of opening up the tummy from above your navel (belly button) down in a straight line (approximately 20 centimetres in length).
What foods irritate the colon?
There are certain foods that can contribute to inflammation in the colon. Red meat, fried foods, refined sugar and carbohydrates, alcohol and coffee can all contribute to inflammation.
Can sigmoid diverticulosis cause pain?
Most people who have diverticulosis don’t show any signs. Those who do might have: Belly pain or cramping.
Why is diverticulosis common in the sigmoid colon?
Not eating enough fiber causes a buildup of waste (constipation) in your colon. Constipation puts extra strain on the walls of the colon. This increased pressure causes the little pockets — the diverticula — to form in weak areas in your colon.
Is there a sphincter between the sigmoid colon and rectum?
A circular muscle structure (sphincter) at the junction between the sigmoid colon and the rectum keeps material within the colon until it is ready to be passed. Strong longitudinal muscle contractions then expel waste material through the sphincter and into the rectum.
What does colon pain feel like?
For example, some may have general abdominal pain, while others may feel pain in a specific spot. People may also feel pain in the area of the rectum, just above the anus. This pain may feel sharp and stabbing or dull and achy.
How do you get rid of poop in your colon?
The most common treatment for a fecal impaction is an enema, which is special fluid that your doctor inserts into your rectum to soften your stool. An enema often makes you have bowel movements, so it’s possible that you’ll be able to push out the mass of stool on your own once it’s been softened by the enema.
Can you poop out a polyp?
Usually, they are discovered and resected during colonoscopy. The spontaneous expulsion per rectum of a colorectal polyp is exceedingly rare. Here, we report a rare and unusual case that we believe is the first of spontaneous expulsion of an adenomatous polyp during defecation.
Can you feel poop in your colon?
Constipation is painful, and people who have it often feel bloated and uncomfortably full. You may also feel the need to go to the bathroom without being able to. When a stool doesn’t pass through the intestinal system, it can become dry and hard and lodge in the colon. This is called fecal impaction of the colon.
Why am I still constipated after drinking lots of water?
Since constipation is related to dehydration in the colon, you need to make sure you are drinking lots of water. When your body is properly hydrated, less water will be withdrawn from the colon. This will keep your stool soft and easy to pass. 2.
Why does poop keep coming out after I wipe?
Common causes of fecal incontinence include diarrhea, constipation, and muscle or nerve damage. The muscle or nerve damage may be associated with aging or with giving birth. Whatever the cause, fecal incontinence can be embarrassing. But don’t shy away from talking to your doctor about this common problem.
What drinks make you poop fast?
- 1 . Jaggery (gur) Drink. Our favorite desi ‘sweetener’ works wonders in curing both chronic and occasional occurrences of constipation. …
- 2 . Lemon Juice. …
- 3 . Apple Juice. …
- 4 . Baking Soda With Water. …
- 5 . Castor Oil. …
- 6 . Triphala Drink.
What are the 5 classic signs of inflammation?
Based on visual observation, the ancients characterised inflammation by five cardinal signs, namely redness (rubor), swelling (tumour), heat (calor; only applicable to the body’ extremities), pain (dolor) and loss of function (functio laesa).
How do you get infection in your colon?
Infection is one of the causes of colon inflammation. Colitis can be caused by viruses, bacteria and parasites. Infection colitis can be contracted from contaminated water, foodborne illnesses or poor hygiene. Other causes include Inflammatory Bowel Disease (IBD), ischemic colitis and diarrhea and abdominal pain.
Can constipation cause inflammation of the colon?
Remedies for ulcerative colitis constipation. Ulcerative colitis is a chronic disease that affects the lining of the large intestine, causing inflammation and ulceration. Diarrhea is common, and constipation can also occur. These symptoms can cause discomfort and affect a person’s quality of life.
How do you poop after a colectomy?
After removing both the colon and the rectum (proctocolectomy), the surgeon may use a portion of your small intestine to create a pouch that is attached to your anus (ileoanal anastomosis). This allows you to expel waste normally, though you may have several watery bowel movements each day.
Is colectomy a major surgery?
A colectomy is a major surgery that requires a lot of healing time, but most patients recover fully and resume normal activities within a few months. To better understand the need for a colectomy, this quick overview of the digestive system may be helpful: The food you eat ends up in your stomach.
How long is hospital stay after colon surgery?
Colon Cancer: What to Expect After Surgery You should expect to be in the hospital for four to five days after surgery.
Can a colon polyp cause pain?
Pain. A large colon polyp can partially obstruct your bowel, leading to crampy abdominal pain. Iron deficiency anemia. Bleeding from polyps can occur slowly over time, without visible blood in your stool.
Can sigmoid colon be removed?
Sigmoidectomy surgery removes all or part of the sigmoid colon – the S-shaped part of the large intestine just before the rectum. Where possible the two healthy ends of the intestinal tract are then rejoined.