1. A device of guiding a dermatologic care process in multiple skin areas, comprising: a carrier which supports a drive of a dermatologic care tool over a skin area while said dermatologic care tool intermittently performs a plurality of dermatologic care sessions each in one of a plurality of skin subareas of said skin area by emitting at least one pulse of light; a light detector which detects at least one of a start and an end of each said dermatologic care session by detecting said at least one pulse of light; and a brake unit which regulates a movement of said carrier from a first of said plurality of skin subareas to a second of said plurality of skin subareas during said drive according to said detection.