Diverticulitis is usually diagnosed by, initially, the clinical picture. People presenting with symptoms to suggest it. The examination, when we feel the abdomen and it's tender where the diverticulosis is usually present. A CT scan of the abdomen usually confirms this diagnosis.
If somebody gets an acute diverticulitis every two or three years it can be treated with antibiotics. Having frequent attacks of diverticulitis can lead to complications, adhesions. Things stick together in the abdomen and then you can have something called "fistula," when you develop an abnormal connection between the colon and the bladder or other organs.