Nail layering and cracking is considered to be nail malnutrition, gray nails, psoriasis, etc., the main is to strengthen the nutrition, medication and so on. 1. Nail malnutrition: If there is usually picky eating or some diseases, resulting in the body has a lack of calcium, zinc and other trace elements, will also lead to insufficient nutritional supplementation of the nail area, the main treatment is to strengthen the nutrition. 2. Gray nail: If there is ringworm fungus may invade the nails to cause gray nail, you can use topical amorolfine applicator, the affected nails plus more, can take oral terbinafine, itraconazole. If the thickness of nail plate is more than 2mm, nail extraction or nail removal surgery can be performed. 3. Psoriasis: If psoriasis involves the nails, there will be punctate depression, nail separation, hyperkeratosis under the nail, which is also manifested as split nails. The main treatment is systematic medication, oral methotrexate, cyclosporine, aromatic vinblastine, or local topical application of hormone ointment or tazarotene cream, which can be applied to seal the package to promote the absorption of the drug, and enhance the efficacy of the treatment. Nail layering and cracking may also be other reasons, it is recommended to consult a doctor in a timely manner, by the doctor to clarify the cause of the standardized treatment, the above drugs should be used in accordance with the doctor’s instructions.