CO2 laser.

"The strongest laser for skin resurfacing is the CO2, that hasn't changed in a long time, that's the gold standard for skin resurfacing. CO2 lasers target both the superficial so right on the surface but also super deep layers of the skin. It removes damaged skin cells and pigmentation, literally it just burns them all off. The recovery time can be longer than other lasers because it is ablative. It stimulates the skin to produce new collagen and skin structures. It's used for deep wrinkles, severe sun damage, significant scarring, sagging skin, and removing precancerous cells."

"CO2 lasers go a bit deeper and are a bit more intense. If you have deep etched-in lines and wrinkles, the best chance you have to minimize them is to do CO2 or an erbium laser, though most lasers are not going to completely erase your lines and wrinkles. However, with great results come great responsibility. The downtime of a CO2 laser can be 1 to 2 weeks, and it's not casual downtime like you have with a fraxel where it's a little flaking and peeling. We are talking about bright red raw skin. Usually within the first 48 hours of having a laser like this, you're having to clean your skin every 2 to 3 hours, and this includes in the middle of the night, because you are vaporizing channels of skin, you have lots of raw skin exposed, and it puts you at a high risk for infection. If you're having this type of treatment done, you are typically placed on antiviral medication, oral antibiotics, and sometimes antifungals. Aside from infection, you also run the risk of hyper or hypopigmentation and you also run the risk of prolonged erythema where the skin is reactive or red for many months after the procedure. These risks aren't that common, but they do happen."

"CO2 lasers are fantastic. You can do it for example around the eyes for around £900 a session, sometimes as cheap as £450, but if you're going to go stronger the session prices may be a little bit higher. Generally you only need like two or three sessions with CO2 laser and it works very well for patients with looser skin, especially above the eye area, which is called the Madonna eye lift. CO2 is very ablative and it can leave with pinkness, redness, swelling around the area."