This document provides information about topical skin care treatments. It discusses how topical medications can achieve a high concentration of drugs in the skin while exposing other organs minimally. It describes the process of percutaneous drug delivery and absorption through the skin. It also outlines different types of topical formulations like powders, ointments, emulsions, gels and their characteristics and use for various skin conditions. It provides details about topical anti-infectives like antifungals and antivirals. It explains PUVA therapy, how it works to treat severe skin diseases using psoralens and UVA light, and its advantages and potential side effects.