Gray nail refers to onychomycosis, a nail disease caused by a dermatophyte infection. Nail fungus in children can be completely eradicated with topical and internal medications, and can also be treated non-medically if necessary. During the treatment, you need to strictly follow the doctor’s instructions and actively cooperate with the doctor. 1. external drugs: ringworm of the nails if the distal damaged nail plate is less than 50%, can be applied externally antifungal medication for treatment, common drugs are amorphophallus powder, cyclopamine cream and so on. 2. Oral medication: Nail fungus is mainly caused by fungal infection, need to follow the doctor’s prescription oral antifungal drugs for treatment, such as terbinafine tablets. 3. Non-drug treatment: including nail extraction or nail removal surgery, laser therapy, photodynamic therapy and so on. If the child has nail fungus, parents should take the child to the hospital in a timely manner, under the guidance of the doctor’s medication, do not take medication without authorization.