when should i be concerned about diarrhea
You should see your doctor about the diarrhea you're experiencing if: 1  Your diarrhea has lasted for more than two weeks (either intermittently or present the entire time) 2  You see blood in or on your stool. 3  You have persistent cramps or severe pain.  You are 1  vomiting. You experience alternating constipation and diarrhea.