Nails need to be hydrated, since most problems crop up when theyre parched. Dry nails can crack, peel, and become brittle. Plus, dehydrated cuticles not only look ragged but also can turn into painful and infected hangnails, says Audrey Kunin, M.D., a Kansas City, Missouri, dermatologist. The best moisturizers are thick even greasy. Try Elizabeth Arden Eight Hour Hand Cream.