Discolored nails can be used as a sign to indicate an infection, a nutritional deficiency and problems with your organs.
Yellow fingernails may be caused by excessive use of nail polish, but it can also be caused with fungal nail infection, or psoriasis.
Brown nails can be a sign of a thyroid disease or malnutrition.
White nails can point to an iron deficiency.
Bluish-gray tint nails can sign your body might not be getting enough oxygen.
Make sure your nail color is normal.