Why does diverticular disease cause constipation?

Diverticula are pouches in the bowel wall. They may coexist with changes in the way the bowel contracts, abdominal bloating, or a tendency to pass hard stools. Pain can also lead a person to delay going to the toilet, which may make stool drier and more difficult to pass. Constipation is a common presentation of Diverticular Disease.

Constipation has many possible causes, including a change in diet, fluid intake, routine, activity, medicines, or another medical condition. It should not be assumed to be due to diverticular disease simply because diverticula have been found.

Arrange a routine clinical review if constipation is new, recurrent, or does not improve with your usual measures. Record your bowel pattern, stool consistency, straining, pain, and any medicines or supplements. A clinician can advise whether dietary fibre, fluids, activity, or a laxative is appropriate for you and whether further assessment is needed.

Avoid straining for long periods. Respond to the urge to pass stool and allow enough time for a bowel movement. If you have been given a specific bowel plan, follow it unless a clinician advises a change.

Seek urgent medical care for severe or worsening abdominal pain, vomiting, a swollen abdomen, inability to pass stool or gas, fever, or blood in stool. Get emergency help if you faint, become confused, or feel severely unwell. These symptoms can suggest a blockage, inflammation, or another urgent cause.

Ask whether your constipation may be related to diverticular disease, which medicines could be contributing, what bowel routine is suitable for you, and which warning signs require urgent assessment.