My anus itches and burns. There is medium dark red blood after I have a bowel movement only when I wipe. I have an ulcer... Could that be related?

Pruritus Ani. Pruritus ani is so common today that it is known as the "space-age" disease. Occasionally, pinworms, lice, fungus, and hemorrhoids may be responsible. Rarely, food allergies, and allergies to drugs such as antibiotics may be the cause. Pruritus ani is also associated with certain systemic disorders such as jaundice, diabetes, lymphoma, and uremia. Pruritus ani is a self-perpetuating disease.
Hemorrhoids or ???? You should get checked. Go see a doctor and have them look. It sounds horrid, but it our job. Many things can cause blood in the stool - some not so bad, but some very dangerous. Go get checked. Please.