Treatment Based on Syndrome Differentiation:
1. Syndrome of Blood Heat and Intestinal Dryness
Main Symptoms: One bowel movement every two to three days, constipated stool, pain in the anus in defecation, with blood drops or blood stained on toilet paper, fresh red color in fistula, abdominal distension and fullness, yellowish urine, slightly red tongue, thin and yellowish coating, wiry and rapid pulse.
Therapeutic Methods: Clear away heat, moisten intestine and promote defecation.

2. Syndrome of Yin Deficiency and Fluid Loss
Main Symptoms: Constipated stool, one bowel movement several days, pain and bleeding drops in defecation, deep red color in fistula, accompanied by drymouth, dry throat, feverish sensation in the chest, palms and soles, reddened tongue, scanty coating, thready and rapid pulse.
Therapeutic Methods: Nourish yin, clear away heat and moisten intestine.

3. Syndrome of Qi Stagnation and Blood Stasis
Main Symptoms: Constipated stool, obvious pricking pain in and after defecation, shrinking anus, purple dark color in fistula, purple dark tongue, thin coating, wiry or hesitant pulse.
Therapeutic Methods: Regulate qi, activate blood, moisten the intestine and promote defecation.

Cautions:
The key importance in the prevention of anal fistula lies in improvement of dietary composition. It is necessary to take more fruits and vegetables and build up a good life habit to have defecation every day.