Hi. Thanks for your query. The most probable reasons for persistent abdominal pain for 3 months are: -Intestinal obstruction; the causes can be intestinal tuberculosis, adhesions, kinking, -Lymph node enlargement -Diverticulitis -Appendicitis or infection of any part of the abdomen. -and many more. Important is to get to the diagnosis:: I would advise: Routine tests of blood, urine, stool. Ultrasonography to start with CT scan - contrast enhanced Enteroclysis ( barium studies if required) Special blood tests as per clinical diagnosis done by your Gastroenterologist. The treatment will solely depend upon a perfect diagnosis to get the relief, which can be medical or surgical.