The morning after a fractional CO2 laser session, most people walk to the bathroom mirror expecting the worst and find something oddly manageable: skin that looks sunburnt, feels tight and hot, and weeps a little clear fluid at the surface. It is not pretty, but it is exactly what healthy healing looks like on day one. What you do over the following four weeks matters far more than that first alarming glance — and good CO2 laser aftercare in Brighton is the difference between skin that settles into a smooth, even finish and skin that heals slowly, pigments unevenly, or scars.
This is a practical, day-by-day guide to that recovery window, written from how we approach post-laser care at our clinic on St James’s Street. Before anything else, one honest caveat: fractional CO2 laser resurfacing is a genuine medical procedure that removes and heats layers of skin. It carries real side effects, it is only suitable for adults, and none of what follows replaces the specific instructions your own practitioner gives you after assessing your skin. Treat this as context, not a prescription.
Why the aftercare decides the result
It helps to understand what the laser actually did. Fractional CO2 creates thousands of microscopic columns of controlled injury across the skin, leaving healthy tissue in between to drive repair. That deliberate wounding is what prompts new collagen to form over the following months. For the first month, though, your skin is essentially an open, healing surface — and open skin is vulnerable to infection, friction, sunlight and its own worst enemy, the picking finger.
The mechanics of the treatment are covered in more depth in our guide to how fractional CO2 laser resurfacing actually works. Here the focus is narrower: keeping that healing surface clean, calm, moist and protected long enough for it to close properly. Get those four things right and you give the collagen response its best chance. Rush them and you invite the complications that make people regret the procedure.
The first 48 hours: keep it calm and moist
The raw phase is short but demanding. Skin will feel hot, swollen and tight, and may ooze a clear or slightly yellow serum that dries into a thin film — this is normal, not a sign of infection. Swelling around the eyes and cheeks often peaks around the second morning, which surprises people who felt fine the night before.
Your practitioner will usually recommend gentle cleansing with cooled boiled water or a prescribed solution, followed by a bland occlusive ointment to stop the surface drying out. Reapply it as often as you are told to — dry healing skin cracks and scars far more readily than skin kept supple. Cool compresses (a clean cloth, never ice directly on the skin) ease the heat and swelling. Sleep propped up on an extra pillow for the first few nights to reduce facial puffiness.
What to avoid in this window is just as important: no makeup, no active skincare, no exercise that raises your body temperature, no alcohol, and absolutely no scrubbing. The goal for 48 hours is boredom — clean, moisturise, rest, repeat.
Days 3 to 7: crusting, peeling and the urge to pick
By the third or fourth day the weeping stops and the skin shifts into a rougher, drier, bronzed phase. It may feel like coarse sandpaper and take on a grid-like texture as the treated columns crust and prepare to shed. Around days five to seven, that layer typically flakes away to reveal fresh pink skin underneath. The exact timing varies with treatment depth and your own biology, so do not panic if you are a day or two ahead of or behind a friend who had the same procedure.
This is the hardest stretch psychologically, because the flaking is visible and the itch to help it along is strong. Do not. Picking, peeling or exfoliating skin that is not ready to release lifts the new surface with it, and that is precisely how post-laser scarring and prolonged redness start. Let every flake fall on its own timetable. Keep applying the ointment or a switch to a gentle fragrance-free moisturiser once your practitioner clears it, and keep your hands off your face.
Most people in office-based or public-facing roles plan five to seven days away from work or visible commitments for this reason. If discretion matters to you, build that buffer in before you book rather than hoping the timeline compresses.
Weeks 2 to 4: pinkness, patience and easing back in
Once the crusting has resolved, the new skin is smoother but noticeably pink or red, a bit like a healthy flush that will not quite fade. This erythema is normal and settles gradually — often over two to four weeks for lighter resurfacing, and longer for deeper treatments. Mineral makeup can usually be reintroduced around this point to even out the colour for daily life, but only once the surface is fully closed and your practitioner has given the go-ahead.
Active ingredients come back slowly and in a set order. Retinoids, vitamin C, exfoliating acids and anything described as “brightening” or “resurfacing” stay off until you are specifically told they are safe, which is commonly around the two-week mark at the earliest. Reintroducing them too soon on barely healed skin is a fast route to irritation and uneven tone. The same restraint applies to the aftercare principles you will recognise from other treatments — the underlying logic of protecting freshly treated skin echoes what we describe in our piece on getting dermal filler aftercare right in the first two weeks, even though the treatments themselves are very different.
Sun protection is the one rule you cannot bend
If there is a single instruction that carries the most weight, it is this: keep new skin out of the sun. Freshly resurfaced skin is acutely vulnerable to ultraviolet light, and sun exposure in the early weeks is the leading trigger for post-inflammatory hyperpigmentation — patchy darkening that can undo the evenness you paid for.
Brighton makes this harder than it sounds. The south coast gets more sun than the UK average, and the light bounces off the sea and the white Regency facades even on a grey day, so “I stayed in the shade” is rarely as protective as people assume. Once the skin has closed, a broad-spectrum SPF 50 becomes non-negotiable, reapplied through the day and paired with a wide-brimmed hat for the first month at least. Before the skin has closed, the answer is simpler: stay out of direct sun entirely. The NHS guidance on sunscreen and sun safety is a sound baseline for how to apply and reapply properly.
Skin tone and the pigmentation question
CO2 laser aftercare is not one-size-fits-all, and skin tone is a large part of why. People with deeper skin tones — broadly Fitzpatrick types IV to VI — carry a higher risk of post-inflammatory hyperpigmentation after any ablative laser, which is why candidacy, laser settings and aftercare should all be tailored rather than generic. This is one of the reasons a thorough consultation matters so much: a responsible practitioner assesses your skin type honestly and may recommend a gentler approach, priming skincare beforehand, or a different treatment altogether if the risk-to-benefit balance is not in your favour. Any clinic that treats every complexion with the same protocol is not doing this part properly.
When to contact your practitioner
Alongside the expected redness, swelling and flaking, a few signs warrant a phone call rather than a wait-and-see: spreading heat and redness beyond the treated area, increasing rather than easing pain after the first few days, pus or a foul odour, a fever, or blistering and unusual crusting that looks different from the general shedding. These can point to infection or a cold-sore flare and are far easier to manage caught early. If you are prone to cold sores, tell your practitioner before treatment — antiviral cover is often prescribed as a precaution.
None of this is meant to frighten you off. Complications are uncommon when the procedure is done well and aftercare is followed, and the vast majority of people move through the month with nothing more dramatic than a few awkward flaky days. But this is medical resurfacing, individual outcomes vary with skin type and healing, and pretending it is risk-free would be dishonest.
Your 30-day CO2 laser aftercare at a glance
| Window | What’s normal | What to do | What to avoid |
|---|---|---|---|
| Days 1–2 | Heat, tightness, swelling, clear weeping | Gentle cleansing, occlusive ointment, cool compresses, sleep elevated | Makeup, actives, exercise, alcohol, sun |
| Days 3–7 | Dryness, bronzing, crusting and flaking | Keep moisturised, let flakes shed on their own | Picking, peeling, scrubbing, work if you need to hide it |
| Weeks 2–3 | Pink/red new skin, smoother texture | Mineral makeup once fully closed, SPF 50 always | Sun exposure, reintroducing actives too early |
| Weeks 3–4+ | Fading pinkness, settling tone | Reintroduce actives only when cleared, keep protecting | Complacency about sun — pigmentation risk lingers |
Frequently asked questions
How long does CO2 laser recovery actually take?
The visible healing — weeping, crusting and flaking — is usually done within five to seven days for a standard fractional treatment, followed by two to four weeks of fading pinkness. Deeper resurfacing takes longer. Your practitioner will give you a timeline based on the settings used on your skin.
Can I wear makeup during CO2 laser aftercare?
Not until the skin has fully closed, which is typically around one to two weeks depending on treatment depth. Mineral makeup is usually the first reintroduced, and only once your practitioner confirms the surface has healed. Applying makeup to open skin risks infection and irritation.
Why can’t I pick the flaking skin?
Because lifting skin that is not ready to shed takes the healing surface with it, which is one of the main causes of scarring and prolonged redness after laser. Every flake will fall on its own — patience here directly protects your result.
Is CO2 laser aftercare different for darker skin tones?
It can be. Deeper skin tones carry a higher risk of post-inflammatory hyperpigmentation, so aftercare, sun protection and sometimes pre-treatment skincare are tailored accordingly. This is assessed individually during consultation rather than assumed.
When can I go back in the sun?
Direct sun should be avoided entirely until the skin has closed, and diligent SPF 50 use is essential for at least the first month — realistically longer on the Sussex coast. Sun exposure on healing skin is the single biggest trigger for uneven pigmentation.
How do I know if something is wrong?
Expected healing eases day by day. Spreading redness, worsening pain, pus, a fever or unusual blistering are reasons to contact your practitioner promptly, as they can signal infection or a cold-sore flare that is best treated early.
Fractional CO2 laser rewards patience more than almost any aesthetic procedure, and the month that follows is where the result is genuinely won or lost. If you are weighing up resurfacing and want to understand how the healing would fit your skin and your calendar, the sensible first step is a consultation with a qualified practitioner — you can book one via Booksy to talk it through before committing to anything.