It may be caused by lack of nutrition. It has been observed that prolonged hunger, paralysis of the fingers or fixed factors can slow the growth of fingernails, and iron deficiency anemia can also cause bumpy fingernails, so supplementation with calcium, protein and sulfur can alleviate the symptoms of bumpy nails. The weather can also cause uneven nails, so the weather is getting cooler, and as winter approaches, the weather will get colder, and the cold will cause blood vessels to constrict, slowing down blood flow and peripheral circulation, thus causing unevenness. Therefore, it is important to do a good job of preventing cold and keeping warm, which can effectively reduce the symptoms of uneven fingernails. Pay attention to fungal infections, because fungal infections caused by personal hygiene can also lead to uneven nails, so pay attention to prevent cross-infection, pay attention to personal hygiene to prevent fungal infections of the feet, the formation of uneven nails symptoms.