If a patient has blood in the stool for several days in a row, the most likely cause is hemorrhoids. Of course, in addition to hemorrhoids, there is also the possibility of having anal fissures. If you want to distinguish between the two, the main difference is whether the patient has dry stools, difficulty in defecation, prolonged defecation and severe pain in the anus during defecation. If these symptoms are present, it is likely to be an anal fissure. If there are no such symptoms and it is just painless blood in the stool, the biggest possibility is internal hemorrhoids. If it is an anal fissure, you can apply topical compound keratanate cream to the anus and take a sitz bath with potassium permanganate every day. If it is an internal hemorrhoid, you only need to apply topical compound keratanate cream topically to the anus. Regardless of whether it is an anal fissure or an internal hemorrhoid, you should pay attention to your diet, avoid stimulating foods, avoid drinking alcohol, take in more dietary fiber, avoid straining to defecate, and keep your bowels smooth. If conservative medication and improvement of lifestyle habits do not work, go to a regular hospital anorectal department for examination.