One of the most common reasons for noticing bright red blood when wiping but not in stool is hemorrhoids. Hemorrhoids are swollen veins in the rectal or anal area. Besides bleeding, they may also cause itching, anal pain, and the sensation of a small lump near the anus. Read more about hemorrhoid symptoms and how they can present.
Another frequent cause is anal fissures, which are small tears around the edge of the anus. These can also lead to bleeding, especially after a bowel movement, and are usually very painful.
Other possible causes of rectal bleeding include diverticulitis, polyps, tumors, and other conditions that can affect the rectum and anus. Because of this, if you notice blood when you wipe but not in stool, it is important to see a proctologist, gastroenterologist, or family doctor. The doctor will examine the anal area, confirm the diagnosis, and recommend the best treatment.
In many situations, no additional tests are necessary. However, if the doctor suspects another condition, tests such as a colonoscopy may be ordered.