Causes of uneven nails: a. Nutritional deficiency anemia. Long-term malnutrition can lead to slow nail growth, suffering from iron deficiency anemia and diseases that cause ischemia of the fingertips, can cause nail bump. So Ming bumpy and nutrition, anemia has a certain relationship. The nails show a lack of calcium, protein and sulfur in the body, which can be extracted from nutrients. Second, fungal infection. Infections caused by various causes of germs can also lead to uneven nails. If the symptoms of the nails are with yellowing and thickening in addition to concave height unevenness, it may be gray nails, and you need to visit the hospital to receive the necessary treatment when you have uneven nails.