No, fingernails and toenails are not harmed by nail polish alone. However, leaving nails polished for extended periods of time—for example, several weeks at a time—can cause the surface to dry out and develop white, chalky areas.
These benign patches, known as keratin granulations, are occasionally confused with white superficial onychomycosis, a nail fungus that has a similar appearance. It may take several months to fully regenerate your nails without painting them if you wish to remove the patches. You can paint over the patches if you do not care.
Using an acetone-based nail paint remover can dry up the nails and surrounding skin, which can harm your nails. Make use of acetone-free products. Additionally, check your nails for any alterations that might indicate a number of health issues each time you remove polish.
Thickened, yellow nails, redness or swelling around the nails, dark streaks, cracking, or malformed nail beds are some of these symptoms. If you observe any such problems, consult your physician.