Healthy fingernails and toenails are smooth, with an even color. Keep your nails clean, dry, and trimmed to pre- vent ingrown nails. If you wear artificial (fake) nails, check around the base and sides of the nails for redness, pain, and infection. Bacteria and fun- gus can grow between the artificial nail and your natural nail. Tell your doctor if you notice nail changes, which also could be the result of health problems, such as diabetes or heart disease.