Home Health Nail Artist Is Warning Women Of This Surprising Symptom Of Melanoma Nail Artist Is Warning Women Of This Surprising Symptom Of Melanoma Aug 13, 2019 By Laura Kelley Yellow nails. Yellow nails usually indicate the presence of a fungus. Other causes are thyroid disease, lung disease, diabetes or psoriasis. White nails. White nails indicate liver damage. A common cause is hepatitis. Brittle nails. Brittle nails typically indicate a deficiency of fatty acids, proteins, vitamin A, iron or calcium. Other examples. Other examples of unhealthy fingernails. The most common causes are displayed. Chipped, brittle nails. The explanation for chipped, brittle nails could be as simple as your laundry detergent. Another common cause is a thyroid disorder. Pale nails. Pale nails usually indicate anemia. There may also be some other sort of iron deficiency at plat. Healthy nails. Strong, healthy, shiny nails. This is our goal. Go wild. Once your nails are healthy enough, you can go a little crazy. Within reason.