Hemorrhoids
Bright red blood in the toilet bowl when you move your bowels could be a sign of hemorrhoids, which is a very common condition. In fact, 75 percent of Americans over the age of 45 have hemorrhoids.

Hemorrhoids are an inflammation of the blood vessels at the end of your digestive tract. They can be painful and itchy. Causes include chronic constipation, diarrhea, straining during bowel movements, and a lack of fiber in your diet.

Treat hemorrhoids by eating more fiber, drinking more water, and exercising. Over-the-counter creams and suppositories may provide temporary relief of hemorrhoid symptoms. See your doctor if at-home treatments don’t help; sometimes a hemorrhoidectomy is needed to remove hemorrhoids surgically.