Fistula Treatment in Pune ! Pain and Discomfort Pain is one of the most common symptoms associated with fistulas. The pain can range from mild to severe, depending on the size and location of the fistula. It may be constant or intermittent and often worsens during certain activities like bowel movements. Swelling and Redness Fistulas can cause localized swelling and redness in the affected area. This is often due to inflammation and infection in the tissue surrounding the fistula tract. Discharge Fistulas can produce discharge, which may consist of pus, mucus, blood, or a combination of these fluids. The discharge is typically foul-smelling and may stain clothing or undergarments.