The present invention relates to an apparatus for treating skin by means of intense pulsed light (IPL). Such apparatus may be used for the treatment of, for example, cosmetic purposes such as hair depilation or dermatological treatment of skin conditions such as acne or rosacea. The present invention provides an improved apparatus that can be used by a non-medical practitioner and comprises a light source for transmitting an energy dose to the skin； at least a first and second sensor each sensor independently capable of measuring a skin parameter； a control system arranged to control operation of the light source in dependence on the first and second sensor measurements.
