Skin is the largest organ, so it’s no surprise that it can also be an indicator of what’s going on inside you. And while too many nights of partying and a less-than-stellar diet can cause the sudden appearance of dark circles and breakouts, sometimes what seems like a harmless beauty issue could be a sign of more alarming issues.
“It is what we call in medicine, dermatologic manifestation of internal disease,” says Neal Schultz, M.D., a dermatologist in New York City and founder of BeautyRx Skincare by Dr. Schultz. “There can be physical signs that there’s something going on internally, and if so, you definitely need to see a doctor.”
Here, the surprisingly common skin, nail, and hair WTHs that could be red flags for your health.