Disclosed herein is a composition containing a high concentration of PG is unexpectedly capable of quickly killing other bacteria, fungi, and/or virus in vitro that is indicative of its potential high efficacy in treating various skin infection. Embodiments disclosed herein relate to a composition and method for effective topical treatment of inflammatory skin lesions in mammals, comprising of a high concentration of propylene glycol alone, or in combination with an astringent. The PG at high concentrations can be regarded as an extremely effective, safe, topical, universal, microbicide.