refers to darkening of the skin after skin surface damage in darker complexioned individuals. It usually appears between 4 & 6 weeks after injury. In some cases it is very dramatic. It is most likely due to increased sensitivity of pigment cells to sunlight, an over done or out of control sun tan. It can be prevented or ameliorated by avoidance of the sun with sunscreen beginning about 2 weeks after injury. At the earliest sign of post inflammatory hyperpigmentation hydroquinone bleaching creams should be started. These usually work within a few weeks but adjustments of the cream strength & frequency of application may be required. In more severe cases Retin-A & a steroid cream may also have to be applied. Sunscreen should be continued while using hydroquinone, usually sunscreen is applied in the morning & hydroquinone at night. Once the normal skin color has returned there is no further need for hydroquinone but sunscreen should be continued for 1 year.