Nails with vertical pits may be related to factors such as onychomycosis, malnutrition or trauma. 1. Ringworm of the nail: caused by fungal infection of the nail plate and subnail tissue, often manifested as roughness of the nail plate, thickening, discoloration, unevenness and so on. 2. malnutrition: if the patient usually picky eating, partiality or excessive dieting, it will cause malnutrition, lack of micronutrients or vitamins needed for the growth of the body, which may also lead to the above situation, and will be accompanied by dry skin, emaciation, loss of appetite and other symptoms. 3. Trauma: when the nails are squeezed, violent impact, etc., it is easy to damage the nail plate or nail bed, which leads to nail growth disorders, vertical lines, pits and so on. There may be other reasons for the pits in the nails, it is recommended to go to the hospital in time for the relevant examination, to clarify the cause of the disease, and then follow the doctor’s instructions to treat the symptoms.