Smaller areas like the upper lip, ears, chin can be treated in less than a minute, while large areas like the back or legs can take up to an hour. First, your provider will determine what laser setting is best for your skin and hair, as well as your goals. Tell them about any medications you’re taking, as well as any medical conditions. You’ll need to put on special eye protection so the laser light doesn’t damage your eyes. During the treatment, the laser emits a concentrated beam of light to damage the hair follicle and prevent regrowth. While your provider methodically treats one small area at a time, you may feel mild discomfort, like a warm pinprick or snap, as the laser passes over your skin.