Tests and diagnosis

By Mayo Clinic Staff

Your doctor will likely examine your nails first. He or she may scrape some debris from under your nail and send it to a lab to identify the type of fungus causing the infection.

Other conditions, such as psoriasis, can mimic a fungal infection of the nail. Microorganisms such as yeast and bacteria also can infect nails. Knowing the cause of your infection helps determine the best course of treatment.

July 21, 2015