Common, temporary effects: redness, swelling, pinpoint bleeding, temporary darkening or lightening of the skin, and blistering.
Less common risks: lasting changes in pigmentation and scarring. The risk of pigment change is higher in darker skin tones, so wavelength and settings are chosen carefully for your skin.
Eye protection. Protective eyewear is worn by everyone in the room throughout treatment, and the eye area is shielded when treatment is close by. Treatment on or near the eyelid or eyebrow, including cosmetic tattoos in those areas, needs particular care and is assessed individually.
Tattoo treatment. Cosmetic and flesh-toned inks, such as those used for eyebrow, lip and permanent-makeup tattoos, can darken when treated, so a test patch is often used first. Clearance is gradual, and some tattoos leave a faint shadow even after a full course, depending on ink colour, depth and age and how your body clears the fragments. Rarely, breaking down ink can trigger an allergic reaction.
Cold sores. If you have a history of cold sores, let us know before fractional treatment on the face. Preventive antiviral medication may be advised.
Reasons to postpone or reconsider: active infection or certain skin conditions in the area, isotretinoin now or recently, some other medications, a history of light sensitivity, a history of keloid or raised scarring, a recent chemical peel or resurfacing treatment in the area, pregnancy and recent tanning.
Aftercare. Keep the area clean, let any crusting heal without picking, and protect treated skin with daily sunscreen before and after treatment.
This is not a complete list.