Diverticulitis is a very serious stage of diverticular disease. It has symptoms similar to that of diverticulosis but with the added complications of inflammation. So symptoms like irregular toilet habit and difficulty in passing out stools are part of diverticulitis. Pain is also a symptom common with diverticulosis but in this case, is much more severe. It is present not just in a specific area but could be spread to other parts of the abdomen. And instead of the pain coming and going away, it is continuous with much less relief for patients.
Even if going to the toilet is successful, this pain will remain because of the inflammation. The infection will most likely result in a high fever. The patient will be very tired, weak and nauseous (feel very sick with vomiting). Diarrhea and frequent going to the toilet happens.
These symptoms may require an urgent trip to the emergency room.