Symptoms of a curled toenail may include: Ingrown nails (onychocryptosis) and toenail fungus (onychomycosis) are the most common causes of curled toenails. Viral infections and other preexisting ...

Here's What Happens If You Don't Wash Your Feet, Says a Medical Doctor Distal subungual onychomycosis ... left untreated. Toenail fungus, secondary nail infections, and ingrown toenails might ...