What are the causes of anal fistula?

Anal impotence is the atrophy of the anorectum, which occurs in the damaged or wounded areas around the anus and rectum and causes purulent infection. The main symptoms are itching, swelling, pain, and pus discharge, which leads to difficulty in defecation, anemia, weight loss, neurasthenia, and may be infected with other viruses, resulting in more serious consequences. The following are the causes of anal impotence.

The causes are as follows:

1. Perianal abscess: It is mainly caused by the retention of contaminated feces in the anal crypts, which causes anal gland inflammation and perianal abscess, and is the main cause of anal fistula.

2. Rectal and anal injuries: Trauma, bone foreign bodies from the digestive tract, metal, anal table and anal speculum examination damage the anal canal and rectum, and bacteria invading the wound can cause perianal abscesses.

3. Anal fissure: Repeated infection of anal fissure can cause subcutaneous fistula and anal gland inflammation.

4. Private part surgery: Too deep injection of internal hemorrhoids or infection after surgery, infection after perineal suture after childbirth, infection after prostate and urethra surgery, etc., can all affect the anorectum and cause abscesses and fistulas.

5. Tuberculosis: Swallowing bacteria or a few bloodstream infections can cause tuberculous anal fistula.

6. Ulcerative colitis: can cause anal fistula.

7. Crohn's disease: may be accompanied by anal fistula.

8. Rectal and anal canal cancer: often accompanied by anal fistula.

9. Bloodstream infection: such as diabetes, leukemia, aplastic anemia, etc., due to the decrease of body resistance, bloodstream infection can often cause anal fistula.

10. Others: Lymphogranuloma, actinomycosis, coccyx osteomyelitis, rectal and sigmoid colon diverticulitis, etc. can also cause perianal abscess and anal fistula.