I am guessing you are meaning diverticulitis. That is inflammation of the digestive tract. It mostly affects the large intestine, causing abdominal pain, nausea, fever, diarrhea/constipation, bloating. The greatest risk factors are obesity, lack of exercise, lack of fiber in the diet and smoking. People that have diverticulitis have a hard time processing certain foods, one of the most common is nuts and anything that contains whole seeds such as sesame seeds or poppy seeds, etc.