The drops used to treat gray nails include salicylic acid glacial acetic acid solution and 3% to 5% iodine tincture. Gray nails, also known as nail fungus disease, is a nail lesion caused by fungi invading the nail plate and underneath the nail, and clinical treatment is based on antifungal therapy. 1. Salicylic acid glacial acetic acid solution: this drug belongs to the compound preparation, mainly composed of salicylic acid as well as glacial acetic acid. Among them, glacial acetic acid has anti-bacterial and anti-fungal effects, which can be used to treat various superficial skin fungal infections. It is applied externally and can be used as an adjunctive treatment for nail fungal disease. If the drug is not used properly, it may cause adverse reactions of contact dermatitis. It is recommended to be contraindicated for those who are allergic to this product. 2.3% to 5% tincture of iodine: the main ingredient of this product is iodine, which is mainly used for skin infection and disinfection, and can be used as an adjunctive treatment for nail fungal disease. Occasionally, allergic reactions are seen. After diagnosed with nail fungal disease, in addition to the use of the above solution adjuvant therapy, the most important thing is also need to take oral antifungal drug treatment, such as itraconazole, terbinafine and so on. It is recommended that patients with gray nails go to the dermatology department of regular hospitals in time, and standardize the treatment under the guidance of professional physicians.