The main clinical manifestations of anal fissure are

Anal fissure is a common condition characterized by a full-thickness tear in the anal canal skin that forms a chronic ulcer. The main clinical manifestations include pain, bleeding, constipation, and anal itching. Among these, pain is the most prominent symptom of anal fissure, presenting as sharp, knife-like or burning pain that may last for a prolonged period. Bleeding may also occur, usually表现为少量鲜红色血液，附着于粪便表面或滴出，有时可见到血迹于卫生纸上.

Patients are advised to seek timely medical attention for proper treatment and management. In daily life, they should increase their intake of dietary fiber, drink plenty of water, maintain good anal hygiene by washing with warm water after bowel movements, avoid prolonged sitting, and engage in appropriate physical activity. If symptoms persist or worsen, prompt medical consultation is necessary.