Many people describe the sensation as a quick snap or a warm pinprick, similar to a rubber band snapping against the skin. The level of discomfort is usually minimal and depends on the individual's pain tolerance and the area being treated. Many modern lasers include a cooling feature to make the process more comfortable.

Most people require between six to twelve sessions to achieve permanent hair reduction. This is because hair grows in cycles, and the laser is only effective on hair follicles in the active growth phase. To treat all the follicles in a given area, multiple sessions are needed, spaced several weeks apart.

Before your appointment, you should shave the treatment area a day or two before to ensure the laser can effectively target the hair follicle. Avoid sun exposure, tanning beds, and sunless tanners for at least two weeks before your session, as a tan can increase the risk of skin damage. It is also important to avoid waxing, plucking, or electrolysis for six weeks prior, as these methods remove the hair root, which the laser needs to target.

Common side effects are generally mild and temporary. These can include slight redness, swelling, or a sunburn-like sensation in the treated area, which typically subsides within a few hours. In rare cases, more serious side effects like blistering, changes in skin pigmentation, or scarring can occur, but these are highly uncommon, especially when the procedure is performed by a qualified professional.