Cuticle The cuticle is the outer portion of a strand of hair. The surface is scale-like. Keeping the cuticle healthy and in tact is critical for the overall health of the hair. Related Articles: Manicure & Pedicure CareDifference Between Pro Hair Dryers and Store Bought Hair DryersHow to take care of your nails after gel polishingShellac Nails vs Gel Nails: What is the difference?Glossary: Developer