The causes of anal fistula and abscess are the following five most common factors:

Anal fistula abscess is a common clinical disease. After the disease occurs, we must quickly find out the cause so as to solve it in time. So, what are the causes of anal fistula abscess?

1. Perianal abscess

It is caused by spontaneous rupture of perianal abscess or after incision and drainage.

2. Rectum and anus injury

Trauma, swallowing of bones or metals, rectal thermometers, anal endoscopy, etc. can damage the anal canal and rectum, and bacteria can invade the wound and cause it.

3. Recurrent infection of anal fissure

Recurrent infection of anal fissure may be complicated by subcutaneous fistula.

4. Perineal surgery

Internal hemorrhoid injections that accidentally enter the muscle layer or postoperative infection, postpartum perineal suture infection, and postoperative infection after prostate or urethra surgery can all affect the anus and rectum and cause abscesses and fistulas.

5. Tuberculosis

In the past, many cases of tuberculosis complicated with tuberculous anal fistula were reported, up to 26.9%, but in recent years it has dropped significantly to 4% to 10%. It is mainly caused by swallowing tuberculosis bacteria, and a small number of cases can also be caused by bloodstream infection.