Anyone suffering from diverticulosis (or uncomplicated diverticular disease) may not display any symptoms at all. However, some people may experience mild cramping pains on the left side of the abdomen, bloating, excess wind and colicky pain. They may also have irregular bowel movements, constipation, diarrhoea or alternating constipation and diarrhoea.
If the diverticula become inflamed (diverticulitis), the patient may suddenly experience constant pain in the lower left side of the abdomen, a raised temperature, nausea and vomiting. Most people will have diarrhoea, although some will suffer from constipation. There may also be rectal bleeding due to weakening of the blood vessels passing through the diverticulum. An acute attack may subside completely, or it may develop into chronic diverticulitis, a low-key, but persistent, disorder.
Anyone suffering these symptoms should consult with their GP immediately, as although symptoms such as pain and rectal bleeding may be due to a more minor condition such as piles, they could be an indication of something more serious like colorectal cancer.