Exploratory surgery may be needed to confirm the diagnosis. Most fistulas form between the sigmoid colon and the bladder. With such a fistula, intestinal contents, including normal bacteria, enter the bladder and cause urinary tract infections. Other fistulas may develop between the large intestine and the small intestine, uterus, vagina, abdominal wall, or even the thigh or chest. Treatment Mild diverticulitis can be treated at home with rest, a liquid diet, and oral antibiotics.
Symptoms usually disappear rapidly.
After a few days, a person can begin a soft, low-fiber diet and take a daily psyllium seed preparation. After one month, a high-fiber diet can be resumed. They're given intravenous fluids and antibiotics, and they stay in bed and take nothing by mouth until the symptoms subside. If the condition doesn't improve, the person may need surgery, especially if pain, tenderness, and fever are increasing. Sometimes surgery for diverticulitis is recommended when a person has no evidence of inflammation, infection, or complications because the risk of developing a problem that will require surgery is high and because surgery before the problem develops will be simpler and safer.