What could be the cause of abdominal pain aside mensuration, and infection like uti,sti,pid?

There are innumerable causes for abdominal pain for there are many organs in it. Appendix, colon small intestines, gall bladder to name a few. If you have abd. pain see a good MD who will help find the reason. Good luck.

It is not feasible to provide a meaningful opinion without additional history, physical examination and may be some tests. It would be prudent to see a doctor. Wish you good health!