The Different Types Of Laser Equipments For Skin & Its Endless Benefits The first lasers used to treat skin conditions happened more than 40 years prior. Argon and carbon dioxide (CO2) lasers were normally used to treat harmless vascular birthmarks, for example, port-wine stains and haemangiomas. Albeit these pigmentations could be viably eased up, an incidental effect was the unsatisfactorily high pace of scar formation.