Anal Fissure Causes & Risks

Causes

A large, dry, or hard stool can tear the lining of the anus. Frequent diarrhea or irritation of the anus and rectum may also lead to a tear.

Risk Factors

A risk factor is something that increases your chance of getting a disease or condition.

Risk factors for an anal fissure:

Constipation
Straining to pass a bowel movement
Prior anal surgery, which can cause scarring and decrease the tissue's elasticity
Chronic diarrhea

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