If you have a taste for cabbage, it’s highly recommended that you avoid this veggie if you have received a diagnosis of diverticulitis. While cabbage does contain a wealth of vital nutrients, it is also known to cause a symptom that can worsen the effects of diverticulitis: gas. As your body breaks down cabbage, it can inflame the intestines and create gas. A common symptom associated with this digestive health issue is gas, which can become extremely uncomfortable. The gas that cabbage causes can further inflame the diverticula, worsening the painful side effects that are often associated with diverticulitis.