Cracked heels with gray nails are usually the manifestation of onychomycosis and tinea pedis caused by dermatophyte infection, and clinically, medication and surgery are usually adopted. 1. cracked heels: for cracked heels caused by keratosis pilaris, you can use topical terbinafine hydrochloride ointment, miconazole ointment and other treatments to inhibit and kill the fungus. 2. Gray nails: clinically, usually oral antifungal drugs, such as terbinafine, itraconazole, etc., in the deck to play an antibacterial role. If the drug treatment is not effective, surgical treatment can be carried out, after local anesthesia to pull out the affected nail. If there is a cracked heel accompanied by gray nails, it is recommended to go to the regular hospital in a timely manner, under the guidance of the doctor to carry out the appropriate treatment, the above drugs need to be used in accordance with the doctor’s instructions, do not self-medication.