Hi and thanks for the query,
The digestive symptoms you describe could be considered part of the clinical picture of the Irritable Bowel Symdrome, IBS
, a non specific non organic cause of gastro intestinal disorders. This simply arises from some lack of inappropriate contractility of the intestines. Exercise, drinking lots of fluids, eating much vegetables and fruits and avoiding late night meals might be of great help.
The itchy rectum
requires a good examination. The whip worm could cause itches, as well as conditions such as hemorroids.
I suggest you book an appointment with your gastroenterologist for a more comprehensive an appropriate care.
Thanks and best regards,