If you want clues about your overall health, look at your fingernails.
“Your nails are a very good reflection of your health. Many things can occur in the nails that can signify systemic or skin problems,” says dermatologist Christine Poblete-Lopez, MD.
Pay attention to anything on or around your fingernails or toenails that suddenly appears different, she says. “Anything that doesn’t look normal ought to be addressed. Your best action is to see a doctor as soon as possible.”
Here are six conditions that can also cause symptoms in the nails. However, for a diagnosis, it’s important to see your doctor, who will consider many factors besides nail symptoms.