Does anal fissure cause constipation?

A fissure is a tear in the anal lining. Hard stools and straining can cause or worsen that tear. The pain of passing stool may then make someone put off going to the toilet. Stool can become drier and harder while it remains in the bowel, which can make the next bowel movement more painful.

Constipation has many causes, including diet changes, reduced activity, medicines, and other health conditions. It should not automatically be attributed to a fissure, particularly if it is new, persistent, or accompanied by other symptoms.

Try to respond to the urge to pass stool, allow unhurried toilet time, and avoid forceful pushing. Fluids and fibre-containing foods can help some people achieve softer stools. A warm bath after a bowel movement may ease local discomfort.

A pharmacist or clinician can advise whether a stool-softening medicine is suitable. If pain causes you to avoid bowel movements, arrange a review so the area can be examined and treatment can be tailored to the cause.

Seek urgent help for severe abdominal swelling or pain, repeated vomiting, inability to pass stool or gas, black stool, heavy rectal bleeding, fever, or feeling faint. Arrange prompt care for ongoing bleeding, worsening anal pain, unintentional weight loss, or a sustained change in bowel habit.

Ask whether a fissure is visible, what may be keeping the stool hard, and how long to use any recommended stool-softening treatment. Tell them about regular medicines, pregnancy, previous bowel surgery, and any blood in the stool.