Nails with raised horizontal lines may be caused by trauma, onychomycosis and iron deficiency anemia. 1. Trauma: If the nails suffer from trauma, it may lead to deformation of the nails, and the symptoms of localized raised horizontal stripes will appear. 2. Onychomycosis: It may be related to the fact that the skin fungus violates the nail plate, and the patient’s nails will have symptoms such as unevenness, horizontal grooves, discoloration, and separation. 3. Iron deficiency anemia: mainly due to iron absorption and metabolism disorders, usually manifested as easy fatigue, shortness of breath, and pale nails, spatulate nails and other symptoms, some of the patients’ nails will appear raised horizontal lines. Some patients may have raised nails. There are many reasons for raised nails, so it is recommended that patients go to a regular hospital to get a clear picture of the cause of the disease.