What to do: Persistent yellowing, thickening, crumbling, or separation of the nail from the nail bed should be evaluated by a healthcare professional. Proper diagnosis is important because fungal infections and other causes require different treatments.
5. Brittle Nails: Many Possible Causes
What it looks like: Nails that split, peel, crack, or break easily.
What it might mean: Brittle nails can result from frequent exposure to water, soaps, detergents, solvents, or other chemicals. Aging can also make nails more fragile. In some cases, brittle nails may be associated with conditions
