Constipation does not affect everyone who has surgery, but it is a relatively common side effect of pain medications, anesthesia, and a lack of mobility.
Depending on which body part or parts the surgery involved, straining to have a bowel movement could compromise stitches or affect the body’s healing processes.
As the body is likely to be more sensitive or prone to damage than usual, it is best to use gentle constipation relief after an operation.
In this article, we discuss the symptoms of constipation after surgery and the available treatment options.
Bowel movements after surgery: What to expect
Many people experience constipation after surgery due to the following factors:
- Medications. Pain medications, diuretics, muscle relaxants, and anesthesia can cause constipation in some people. Opioids, in particular, can reduce bowel movements.
- Dietary changes. Some people may need to avoid food before surgery, while others may need to restrict or change their diet for some time after the operation. Too little fluid and food can cause constipation.
- Lack of physical activity. Inactivity is a common cause of constipation. People recovering from surgery often need to rest for extended periods and avoid strenuous exercise. This lack of movement slows down the digestive system.
The symptoms of post-surgical constipation include:
- a sudden decrease in bowel movements
- passing fewer than 3 stools in a week
- straining to pass stool
- lumpy or hard stools
- the sensation that the rectum is not empty, even after having a bowel movement
- feeling as though there is a blockage in the rectum
- needing help to empty the rectum, such as pressing on the stomach during a bowel movement
- bloating or gas
- pain in the stomach or rectum
Untreated constipation can be uncomfortable and lead to complications, particularly after surgery.
However, it is vital to always ask a doctor before using constipation relief, as some methods may not be safe after certain medical procedures.
The methods for constipation relief below may be sufficiently mild for people to use after surgery, as long as they follow the advice of a doctor:
Keep the body moving
As soon as a doctor gives the go-ahead, people should start moving around. Going for short walks around the hospital or home or doing other physical activity will help move food through the intestines and stimulate a bowel movement.
Research has shown that insufficient physical activity and excessive sedentary behaviors correlate with constipation. Physical activity may prevent people from feeling constipated.
People who are unable to get out of bed can move their arms and legs where possible to promote circulation and help the bowels move.
Laxative medications
A doctor may prescribe a stool softener for people with post-surgical constipation.
These medications, which include docusate sodium (Colace), draw water from the intestines to moisten the stool. Moist stools are easier to pass.
Alternatively, a doctor may recommend a fiber laxative, such as psyllium (Metamucil or Konsyl) or methylcellulose fiber (Citrucel).
Doctors do not recommend fiber laxatives for people whose constipation results from opioid medication use, as they could cause severe abdominal pain and potential bowel obstruction.
Other medications for constipation include:
- Stimulants, such as bisacodyl (Ducodyl or Dulcolax), which make the intestines contract to produce a bowel movement.
- Osmotic drugs, such as magnesium hydroxide (milk of magnesia), to move fluids through the colon.
- Lubricants, such as mineral oil.
- Enemas and suppositories, which can soften the stool.
People should not take over-the-counter (OTC) remedies for constipation without speaking to a doctor first. Not all constipation medications are suitable for everyone, especially during post-surgery recovery.
Fiber helps stool pass through the digestive tract.
Adults eating a daily diet of 2,000 calories should aim to consume 25 grams (g) of fiber each day, according to the American Heart Association.
High-fiber foods include:
- fruits
- vegetables
- whole grains
- nuts and seeds
- beans and lentils
People who do not have a good appetite after surgery can try drinking a smoothie comprising blended fruits and vegetables to boost their fiber intake.
It is also important that people increase their fluid consumption when they begin to eat more fiber.
Avoid certain foods
Some foods are more likely than others to cause constipation. People should limit or avoid the following foods until constipation resolves:
- dairy
- processed foods
- refined grains, such as white bread, white rice, and white pasta
Snack regularly
Consuming food can stimulate a bowel movement. For this reason, eating small, frequent meals may help ease constipation.
How long does constipation after surgery last?
Most people with constipation following surgery will experience relief after a few days, especially if they receive treatment quickly.
Stool softeners and fiber laxatives tend to act within a few days, while stimulant laxatives and suppositories typically work within 24 hours.
The exact amount of time that it takes will depend on several factors, including:
- a person’s overall health
- the duration of anesthesia
- the type of medication
A person should speak to a doctor if their constipation persists for more than a few days.
Outlook
Many people experience constipation after surgery due to pain medications, anesthesia, or a lack of movement following the procedure.
The outlook for people with constipation after surgery is generally good. Most people will feel better within a few days once they receive treatment.
Always speak to a doctor before taking medication for constipation, especially after surgery and when taking other medications, as some drugs can interact.
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