If an anal fissure occurs in the toilet, first of all, don’t be nervous. Anal fissures are relatively common in clinical practice, mostly due to dry stool, which leads to skin fissures around the anus. If an anal fissure occurs, it is usually divided into acute and chronic fissures. For acute anal fissures, conservative and medication treatment can be performed first. Pay attention to your diet and avoid spicy and stimulating foods. Use warm salt water or 1:5000 potassium permanganate sitz bath to promote healing of the wound and blood circulation around the anus. If the fissure is more serious, surgery should be performed. Chronic anal fissures usually present as a triad of anal fissures, anterior hemorrhoids, and enlarged anal papillae. Chronic fissures that do not respond well to conservative and pharmacologic treatment should be treated surgically with anal dilation to relieve the spasm of the internal anal sphincter or with fissure removal.