What are fungal nails?

A fungal nail is caused by a fungal infection of the nail. Fungal nail or onychomycosis is also called lime nail. The most common causes are the fungi Trichophyton rubrum and Tricophyton interdigital. Onychomycosis mainly occurs with the toenail, but the fingernails can also become infected. It is the most common condition of the nail that the pedicure comes across.