Refrain from having anti-inflammatory pain medications. Causes are more or less idiopathic, ie reasons for this is unknown yet! one possible cause is an immune system malfunction. When your immune system tries to fight off an invading virus or bacterium, an abnormal immune response causes the immune system to attack the cells in the digestive tract, for diet: avoid foods that you know cause you trouble. You can have lots of probiotics and curd. Consult privately so as to question you to ascertain your personality and ailment. Permanent cure is available in biochemics.