The 24th day of anal fissure excision surgery and hard bowel movement may cause anal fissure to bleed a lot. After 24 days of anal fissure surgery, the wound may not be completely healed, if the care is not proper, the wound may be infected and cracked. If you are constipated at this time, and force to discharge hard stool, you may tear the anal canal, accompanied by anal pain and bleeding, and the amount of bleeding may be more or less, and if the tearing is more serious, you may bleed more. Appropriate physical exercise can help to promote the peristalsis of gastrointestinal tract, which can prevent constipation. Normally, pay attention to light diet, prohibit spicy and stimulating food, drink more water, you can drink some chrysanthemum or herbal tea, and develop the habit of defecation every day in order to keep the bowel movement smooth, and try to avoid straining to have hard bowel movement, which will aggravate the condition. If there is any discomfort after anal fissure surgery, it is recommended to consult the doctor in time to give prevention and treatment.