Chinese patent medicines for treating gray nails include Ringworm Wet Potion and Coral Ringworm Pure. Ringworm Wet Potion has the efficacy of removing dampness, dispelling wind, stopping itching and killing insects. It can be used for the treatment of goose paws wind caused by wind-dampness and poisonous insects, foot dampness, etc., which is characterized by skin papules, flaking and so on. The adverse reactions and contraindications of this product are not clear. Be careful not to import. Coral ringworm net has the efficacy of antipruritic and bactericidal. It can be used for the treatment of toenail ringworm, fingernail ringworm, tinea cruris, tinea pedis. Contraindications and adverse reactions to this product are unclear. This product is not suitable for vesicular exudative foot wetness. The affected area should not be washed with hot water. External use of the drug should pay attention to avoid importing, strictly prevent touching the eyes, mouth, nose and other mucous membrane, skin breakage with caution. It is recommended to go to the hospital as soon as possible, and the medication should be guided by a professional doctor.