There is no quick fix for split nails, the main reason is to deal with the specific cause, common causes are trauma, fungal infection, malnutrition and so on. The common causes are trauma, fungal infections, malnutrition, etc. Relevant medications or surgeries can be applied to repair the cause. 1. Trauma: If the nail splits due to trauma, it is only slightly broken, generally no special treatment is needed, just cut the broken part, and it can gradually recover by itself. If the nail bed is exposed due to nail splitting, it can be sterilized with iodine povidone, and then rubbed with antibiotic ointment such as fusidic acid ointment and mupirocin ointment to prevent infection and promote repair. 2. Fungal infection: If the nail splitting is caused by fungal infection, resulting in infection of the nail or nail plate tissue. In this case, you can be instructed by your doctor to apply topical antifungal medications such as cyclopirox and amorolfine. If necessary, you need to use oral antifungal drugs such as terbinafine tablets and itraconazole capsules. It is beneficial to promote the repair of split nails. 3. Malnutrition: commonly found in children who are partial to and picky about food, resulting in the lack of zinc, iron, calcium and other trace elements and vitamins, resulting in poor nail growth, which is manifested in transparent nails, brittle, easy to split due to external forces. At this time, it is necessary to screen trace elements and vitamins, and then timely supplementation. Nails split, if the symptoms are serious, should consult a doctor in time, by the doctor to guide the treatment to be repaired. The medication should be used according to the doctor’s instructions.