Fingernails have been called the windows to your well being because they can predict anything from hair loss to cancer.
"There is actually a syndrome called yellow nail syndrome where the growth slows, the nails become over-curved, they turn yellow. This is associated with diseases of the lungs including bronchitis," says Dr. Lynne Goldberg, dermatologist.
Dr. Goldberg says that a color change is a warning sign for several problems. A very dark brown or black streak in just one nail could be a sign of melanoma. Very white nail beds may indicate liver disease. But color is not the only clue.
Thyroid disease can cause your nails to separate form the nail beds. Dr. Goldberg says you should get checked for anemia if you develop spoon shaped nails, which means the nail could actually hold a drop of water.
She also says that nails can also predict hair loss or psoriasis if they are pitted, but before you start checking your nails for trouble remember that many other things can cause a change in your nails -- like frequent hand washing, nail polish, and even aging to name a few.
If you're concerned about a change in your nails, you might ask your doctor about it, just to be on the safe side.