Bleeding two years after hemorrhoid surgery may be due to recurrence of hemorrhoids, anal fissure, rectal cancer and so on. 1. Recurrence of hemorrhoids: The recurrence of hemorrhoids is usually caused by poor diet and work routine, hemorrhoids will cause anal itching and pain after the recurrence of hemorrhoids. If the hemorrhoids rupture, it will cause the symptoms of anal bleeding. 2. Anal fissure: anal fissure may also cause anal bleeding symptoms, patients because of dry stool or trauma and other reasons caused by the anal canal skin damage rupture, wiping after the stool will be with blood, if the situation is serious, blood will flow out on its own. 3. Rectal cancer: patients with rectal cancer will have anal swelling, irregular stools, and some patients will have constipation, which will lead to anal bleeding as the condition worsens. There are other reasons for anal bleeding, such as perianal abscess, anal fistula and other diseases, we should go to the hospital in time, and take active treatment to avoid delaying the condition.