Diverticulitis occurs when one of these pockets becomes inflamed or infected. Only 15 percent to 20 percent of people with diverticulosis develop diverticulitis. Diverticulitis is a painful and potentially serious problem that requires immediate medical care. It can come on rather abruptly. First-time attacks may occur in your 40s or 50s.
Symptoms can vary.
You may experience severe cramping and possibly tenderness, usually more so in the lower left side of your abdomen. Or, you may just have persistent mild abdominal pain. Symptoms also commonly include fever and nausea. Diverticulitis can range from a minor inflammation to a massive infection or an intestinal wall perforation that requires immediate surgery. See your doctor right away if you suspect you have diverticulitis.