A rectovaginal fistula is an abnormal passage that forms between the rectum and the vagina, two organs that sit very close together in the pelvis. When rectal cancer grows toward the vaginal wall, surgeons may need to remove part of that wall and stitch it closed. If the repaired edge does not heal completely, a small opening can develop. Passing gas or stool through the vagina, unusual discharge, odor, or signs of infection are common clues that this has happened.
The problem is more likely when radiation therapy (radiotherapy) has been given before or after surgery. Radiation affects not only cancer cells but also the tiny blood vessels around them. Over time this reduces blood flow and causes the tissue to stiffen, a process called fibrosis. Tissue with a poor blood supply receives less oxygen and fewer nutrients, so its ability to heal is weakened. When a repair is also under tension, a single stitch may pull apart or an abscess may form, reopening the fistula. This is a recognized complication of irradiated tissue, not the result of anything the patient did wrong.
Treatment depends on the size and location of the fistula, how much inflammation is present, and the history of radiation. A small, quiet fistula may be given time to close on its own with rest, good nutrition, and control of infection. If it reopens repeatedly or is heavily contaminated, a temporary diverting stoma may be created so that stool bypasses the area and the wound can rest. Once the inflammation has settled, a repair using healthy, well-supplied tissue can be planned. In irradiated areas, waiting for the right moment rather than rushing often improves the chance of lasting healing.
During recovery, keeping pressure off the repaired area matters. Sitting for long periods concentrates weight low in the pelvis, so lying down, changing position often, and shifting weight to one side while seated can help. If a cushion presses on a tender spot, a different shape may be more comfortable. Eating enough protein and calories, keeping bowel movements soft but formed, and reporting fever, increasing pain, more discharge, or bleeding without delay all support healing.
This experience is tiring for both body and mind. It is natural to feel discouraged when things become more complicated than expected. Remembering that delayed healing in irradiated tissue is not a personal failure, but something managed step by step over time, can ease that burden.
This article is for general information only and does not replace individual medical care. Please discuss decisions about your own condition and the timing of treatment with your healthcare team.