Lasers, can help by reducing the total bacteria (Proprionibacterium acnes) and by reducing the size of sebaceous glands, and thus the production of sebum.
Lasers and lamps which act on Proprionibacterium acnes are:
– Blue light, thanks to pulse lamps (which have a spectrum of excitation of about 400nm).
– KTP laser (532 nm).
– All Pulsed Dye Lasers (585 and 595 nm)Lasers which act on the sebaceous glands.
– Infrared lasers:
1) Lasers at 1320 nm.
2) Lasers at 1450 nm.
The diode 1450 nm laser (the ‘Smoothbeam’) is strongly absorbed by water, resulting in a maximum heat effect in the papillary dermis, at a depth of about 200-400 microns. The sebaceous glands are at this depth. The created heat leads to the fibrosis of the sebaceous gland, and greater collagen production. The aim is to gradually heat the upper dermis (surface layer) without damaging the epidermis, hence without burning it.
A slight red rash (erythema) can last from a few hours to a few days after the treatment, but it is easy to cover with make-up.
3 or 4 sessions will be needed, at an interval of one month.
3) 1540 nm. The Er-Glass 1540 nm ARAMIS laser acts on the sebaceous glands and the follicular infundibulum. Thanks to the length of its waves, absorbed by the targets and water, and barely captured by melanin, the treatment is suitable for dark and tanned skins. 3 or 4 sessions will be needed, at an interval of one month.