Do fingernails reveal any information about a person’s health?

To the extent that nails provide clues to health, these clues are usually too little, too late.

Years ago, when sophisticated diagnostic tests were not available, doctors sometimes looked to the appearance of nails for clues to a patient’s health, said Dr. Howard Baden , a dermatologist at Massachusetts General Hospital. “And the nails do change with some diseases. But by the time the nails are involved, the patient is pretty sick,” he said.