What Your Fingernails Say About Your Health
1. Yellow Nails
Your nails may yellow with age or due to the use of acrylic nails or nail polish. Smoking can also stain nails a yellowish hue. If your nails are thick, crumbly, and yellow, a fungal infection could be to blame.
Less often, yellow nails may be related to thyroid disease, diabetes, psoriasis, or respiratory disease (such as chronic bronchitis).