Be cautious with nail hardeners
Some hardeners may provide temporary protection, but products containing formaldehyde can make nails excessively hard and more likely to break when used continuously.
Stop using a hardener if it causes burning, redness, pain, or increased brittleness.
Avoid aggressive buffing
Light buffing can temporarily smooth shallow ridges, but frequent or forceful buffing thins the nail plate.
Deep ridges should not be filed away.
When to See a Healthcare Professional
Arrange an evaluation if nail changes:
Appear suddenly
Affect only one nail without a clear injury
Continue to worsen
Persist despite gentle care
Cause pain or swelling
Include pus or redness around the nail
Make the nail thick, yellow, or crumbly
Cause the nail to lift from its bed
Produce deep horizontal grooves
Affect most or all nails at the same time
Occur with fatigue, weight change, hair loss, or cold intolerance
Occur with a rash, joint symptoms, or other signs of illness
