Whether or not the nails with vertical lines need to be supplemented with vitamins, it is necessary to identify whether they are caused by physiological factors or pathological factors, except for the pathological causes of vitamin A deficiency, the rest of the causes do not need to be supplemented with vitamins. 1. Physiological factors If the vertical lines on the nails are relatively regular, all ten fingers have them, and are not accompanied by other symptoms, they are physiological and do not need to take vitamins. 2. Pathological factors Lack of certain elements can lead to irregular vertical lines on the nails. If there is a lack of vitamin A, it is necessary to supplement vitamin A and so on. Other nail diseases can also cause vertical lines on the nails, non-vitamin A deficiency does not need to supplement vitamin A. Lichen planus can be treated with glucocorticoid drugs such as dexamethasone ointment. Nail fungus can be treated with topical antifungal drugs such as cyclopiazole and amorolfine, and oral antifungal drugs such as fluconazole and itraconazole. It is recommended to maintain a scientific and reasonable diet in daily life, pay attention to hand hygiene, pay attention to rest, and develop good living habits. The medication should be used in accordance with the doctor’s instructions.