Post-inflammatory hyperpigmentation (PIH) is an acquired hyper melanosis that occurs after cutaneous inflammation or injury frequently affecting darker skinned individuals. Bakuchiol is derived from plants and has inhibitory effects on melanin synthesis, which makes it a promising therapeutic intervention in the management of PIH. This study aims to evaluate the efficacy of bakuchiol in treating post inflammatory hyperpigmentation using the investigators previously validated model in comparison to acne induced PIH.