Is gray nail contagious?

Onychomycosis, medically known as tinea unguium, is a common skin disease caused by fungal infection, primarily affecting the fingernails and toenails. It is contagious and can be transmitted through direct contact (e.g., touching the skin or nails of an infected person), indirect contact (e.g., sharing towels, shoes, or other personal items), among family members, and in public places. If you suspect you have onychomycosis, consult a doctor as early as possible. Depending on the severity of the condition, treatment may involve topical antifungal creams, solutions, or oral antifungal medications. Do not purchase medications on your own, as inappropriate treatment may cause the disease to persist or worsen.