The system for treating a region of the epidermis, comprising: —at least one laser energy source； —a time control device to generate a laser beam； —a laser energy focusing system arranged and produced to direct a laser beam on said region of the epidermis. The control device generates a laser beam comprising a plurality of composite pulses, emitted at a base frequency, each composite pulse comprising a sequence of sub-pulses at a higher frequency than said base frequency.
