Tests and diagnosis

By Mayo Clinic Staff

Tests and procedures used to determine what's causing your diarrhea may include:

  • Physical exam. You'll have your temperature measured to check for a fever. Your blood pressure and pulse may also be measured to check for signs of dehydration. Your doctor may also examine your abdomen for abdominal pain.
  • Review of your medications. Your doctor may ask about any medications you're taking, including over-the-counter drugs. Also, tell your doctor about any supplements you take.
  • Blood test. A complete blood count test may help determine what's causing your diarrhea.
  • Stool test. Your doctor may recommend a stool test to determine whether a bacterium or parasite is causing your diarrhea.
Jun. 11, 2013