The pain of diverticulitis can vary from person to person and may depend on the severity of the condition. The most common symptom of diverticulitis is abdominal pain, which is often felt on the lower left side of the abdomen. The pain may also occur on the right side or be more generalised. The pain is usually constant and can range from a dull ache to a sharp, stabbing sensation. Some people describe the pain as feeling like a cramp or spasm.