All skin types, except sensitive use nightly. Sensitive skin may use End of the Line LOTION Mild every other night and increase to nightly as their skin can tolerate. Begin with Gentle strength, then move up to Strong and Extra Strong after consulting your skin care professional. Some individuals may never be able to tolerate higher strengths. Follow with your Dermaware treatment as per your recommended regimen. Call 888-292-DERM for more information or for a Dermaware Spa near you.