Having had an anorectal abscess usually precedes the development of a fistula. Signs of an anorectal abscess include:
- A vague feeling of being unwell or uncomfortable
- Swelling and discomfort around or near the anus
- Redness around the area
- Drainage of pus or fluid from the area
A person who has had these symptoms should see his or her doctor to ensure that a fistula does not develop as a result of the infection.
Causes and Risk Factors
The biggest factor in whether a person develops a fistula is whether they have had an anorectal abscess.