What is the nature of the lower abdominal pain caused by Ibuprofen?

== == It is a irritation of the lower bowel's walls. The medication has a acidic base, so it sometimes inflames the intestinal tissues. it can also indicate internal bleeding, even if you are not seeing blood in your stool. a very simple test can be done in your MD's office to detect the presence of blood...& the results are immediate. please, visit your MD.