Medically reviewed by Casey Gallagher, MD Psoriasis and ringworm (tinea corporis) cause scaly rashes but have different causes and treatments. Psoriasis is an autoimmune condition, while ringworm is a ...

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 ...