According to an article in the journal diverticulitis is one of the most common gastrointestinal diagnoses in United States clinics. Medical treatmentTrusted Source may include Doctors may recommend that people follow a clear liquid diet during an acute flare-up of diverticulitis. Some research suggests that dietary changes — such as eating more fiber and probiotics while avoiding certain carbohydrates and red meat — could help some people with diverticulitis symptoms.