Photorejuvenation is a process involving the use of intense pulsed light (or other thermal or chemical methods) to treat some skin conditions and remove wrinkles arising from photoaging.

Photorejuvenation works by inducing controlled wounds on the skin, which prompts the skin to heal itself by creating new cells. This process reverses the effects of (photo-)ageing to a certain extent by removing wrinkles. (Source: Wikipedia.org)