Nail transverse lines not accompanied by other lesions may just be a problem of malnutrition, which requires dietary adjustments and nutritional supplements. If necessary, go to the hospital for examination. The appearance of horizontal nail lines may be related to nail malnutrition, it is necessary to pay attention to the overall supplementation of nutrition, appropriate supplementation of calcium and zinc, and adjust to a healthy and regular work and rest time. In daily life, we should pay attention to the maintenance of nails, such as not excessive nail clipping, do housework with gloves, do not excessive manicure and so on. As new nails gradually grow to replace the old ones, the horizontal lines will subside. If there is any abnormality in the nails, it is recommended to go directly to a professional hospital for diagnosis and treatment instead of making unauthorized judgments and causing panic.