article_snippet.sent: Sometimes it feels like really severe stomach cramps, but I also get really bad stabbing pains that won't go away. '
article_snippet.sent: Experts believe the condition is, in part, inherited, while an abnormal reaction of the immune system to certain bacteria in the intestines is thought to contribute.
article_snippet.sent: Abdominal pain and diarrhoeaTiredness and fatigueFeeling generally unwellMouth ulcersLoss of appetite and weight lossAnaemia - a reduced level of red blood cells .
article_snippet.sent: The contents of the bowel can leak through and form an abscess.
article_snippet.sent: the bowel causes pain and a fever.