What tests can help find the cause of fatigue?

Fatigue can have multiple drivers, so the most helpful testing usually starts with basic tests that can reveal common, reversible causes. A complete blood count plus ferritin and iron studies can check for anemia or iron deficiency, which is especially important if you have heavy or prolonged periods.

We also often consider thyroid testing and, in some situations, vitamin B12 and vitamin D levels, because low or abnormal results can meaningfully affect energy and recovery. If your fatigue comes with digestive symptoms, urinary frequency or bladder pain, or significant pelvic pain, identifying and treating those underlying contributors can reduce the day-to-day drain on your energy. If you’d like, our team can review your symptoms and history and help you decide which labs and next-step evaluations make the most sense for you.