Despite popular belief, there are no foods that trigger diverticulitis, according to the Mayo Clinic. Many people believe that foods such as nuts and popcorn become lodged in the diverticula, causing inflammation and pain, but there is no evidence to support this.
Preventing a diverticulitis attack is best accomplished by eating certain types of foods, rather than avoiding foods, according to the Mayo Clinic. For instance, eating foods high in fiber cause waste in the colon to soften, which helps it move more quickly through the body. Some foods that are in high in fiber are fruits, vegetables and whole grains. Examples of fresh fruits that are high in fiber are apples, pears and prunes. Good high-fiber sources of vegetables include squash, potatoes, peas and spinach. Ideal whole-grain products are breads, pastas and cereals.
Patients who are experiencing severe symptoms from diverticulitis are often placed on a liquid diet, according to WebMD. A liquid diet consists of broth, juices and ice pops. As the severity of symptoms decrease, patients are normally allowed to ease back into a normal diet over a few days. It is best to start with low-fiber foods such as dairy products, white bread, meat and poultry.