Learn about toenail fungus types, symptoms, and prevention methods. Discover what nail changes reveal about your health and immune system.

Medically reviewed by Katlein Franca, MD Toenail fungus, or onychomycosis, is a nail infection that can make your toenails thicker, change color, or break apart. It affects about one in 10 people and ...

Your nails can reveal hidden health clues, from vitamin deficiencies indicated by dark lines or white spots, to potential liver or kidney issues signaled by fully white nails. Nails can be silent ...

Knowing which type of psoriatic arthritis you have can help inform your treatment and perhaps your prognosis. Systemic (whole body) and biologic drug treatments are similar for the different forms ...