Patient Q: Hello, recently I feel pain in my anus after a bowel movement, and it lasts for a long time. I had this a while ago, then I took some medicine to get better, and now it hurts again! Is this a common occurrence? What is the best treatment? What should I pay attention to? Thank you! Hello: According to your symptoms, I think you have an anal fissure. The most prominent symptom of anal fissure is pain in the stool, which is a periodic pain, i.e. cutting pain when defecating, often accompanied by fresh blood in the stool, but not a lot. After a short period of relief after a bowel movement, there can be a crushing pain, which can last for several hours and is caused by spasm of the internal anal sphincter. This is very common, do not worry about it. You can use some anal suppositories or ointments, warm water baths most can relieve. If there is no effect, you can go to the regular anorectal department for consultation and treatment, if necessary, a small surgery can be cured.