Call your doctor promptly whenever you have rectal bleeding or any bloody discharge from the anus. Even if you have been treated for a bleeding fissure in the past, it is always safer for your doctor to determine the best course of action. This is especially true if you are over age 40, when there is an increase in the risk of rectal bleeding from colorectal cancer and other serious digestive diseases.
Also, call your doctor if you have:
Severe pain in the anal area
A tender mass or swelling near the anus, with or without a fever
Pus or a foul-smelling discharge from the anus
Discomfort or tightness in the anal area that interferes with bowel movements