Painful cramps in the legs that get better with rest can be a sign of poor circulation. Skin color changes, such as appearing pale, bluish, or gray, indicate poor circulation. Brittle nails and hair ...

Steffini Stalos, DO, FCAP, is a pathology and lab medicine physician. She is also the chief medical officer of the lab consultancy firm Blood Associates, LLC. Mean corpuscular hemoglobin concentration ...