Thick skin under the toe nails and finger nails are often sign of fungal condition medically known as onychomycosis. (diyhealthremedy.com)
People with HIV and AIDS commonly develop onychomycosis, a fungal infection that causes nails to discolor, thicken, and separate from the nail bed. (health.com)
Nail fungus, also known as onychomycosis or tinea unguium, is an infection caused by fungi below the surface of the nail. (americanpregnancy.org)