Anal fissures are ulcers formed after the skin of the anal canal has been cracked, with anal pain, bleeding, constipation and anal itching as the main symptoms. Whenever there is a problem with the anus, the first thing that comes to mind is “do I have hemorrhoids? This is the case with many people who have anal fissure bleeding, because they don’t know about this disease, their doubts and worries are increasing day by day, and some people even think that this is a precursor of bowel cancer. In fact, the difference between anal fissures, hemorrhoids and bowel cancer is quite obvious. The bleeding of anal fissure and hemorrhoid are both bright red, but each has its own distinctive features. In the latter case, the bleeding is usually more than 10 drops. In the case of bowel cancer, the bleeding is often dark red, mixed with mucus or pus, and the stool habit will change significantly, with more frequent stools and a feeling of urgency followed by heaviness. If the diarrhea does not subside after medication, it is important to pay special attention. In addition, the incidence of the three groups of people are different. Hemorrhoids and anal fissures can occur in people of any age, while rectal cancer patients are mostly middle-aged or elderly. Self-checking method of anal fissure at home The clinical manifestations of anal fissure mainly include pain, bleeding, constipation, anal itching and other symptoms, we can conduct self-checking at home through these symptoms of anal fissure, if you have these symptoms, then go to hospital for treatment. ①Whether it is painful: its main manifestation is severe, persistent and severe pain, which can continue to intensify and can be relieved automatically after a few hours. ②Whether it is bleeding: When defecating, it can cause bleeding from the fissure by damaging the trauma.