In short. Active acne or infection, a keloid tendency, a pigment disorder injury worsens, recent oral retinoid treatment, uncontrolled diabetes and true laxity.
Key points
- Some patients are unsuitable because of their skin and some because of their concern.
- A patterned course does not lift tissue that has descended, does not restore lost volume, and does not release a scar that is tethered underneath.
- Someone whose real complaint is one of those has a different answer available, and the honest consultation names it rather than offering more sessions.
Every treatment has a list of people who should not have it, and a clinic that turns nobody away is not assessing anybody. For a patterned resurfacing course the list is short and specific, and most of it is about conditions that can be corrected or waited out rather than about patients who can never be treated.
Skin that is inflamed or infected now
Active acne in the area, an eczema or rosacea flare, an open lesion, a bacterial infection or a cold sore starting are all reasons to wait rather than reasons to abandon the idea. Treating inflamed skin adds injury to skin that is already reacting, and the healing becomes unpredictable. Acne also has to be settled before scarring is treated at all, because treating scars on skin that is still breaking out is treating a moving target.
Skin that scars or pigments badly
A keloid tendency is a reason to be cautious about any treatment that removes surface, and on some areas a reason not to treat at all. A history of pigment problems after previous injury or laser treatment is the other marker: it does not disqualify a patient, but it changes the plan to shallower columns, lower density, wider intervals and longer priming, and it makes a test spot more valuable than any prediction.
Medicines and conditions that slow healing
Recent oral retinoid treatment changes how skin heals, and the interval before treatment has to be planned rather than assumed. Uncontrolled diabetes, some medicines that affect healing or bleeding, and any condition that leaves the skin slow to close all raise the risk of delayed healing, which is the situation that most often precedes a scar. None of these makes treatment impossible; all of them change when and how it is done.
The wrong problem is also a reason to say no
Some patients are unsuitable because of their skin and some because of their concern. A patterned course does not lift tissue that has descended, does not restore lost volume, and does not release a scar that is tethered underneath. Someone whose real complaint is one of those has a different answer available, and the honest consultation names it rather than offering more sessions.
When the answer is a different plan
For a fair number of patients the issue is not the treatment but its arrangement. Someone whose pigment risk is high may be better served by a lighter plan with a smaller change. Deciding against a fractional course is a result of an assessment, not a rejection by it.
Do not proceed while
- The area is inflamed, infected or in a flare, or a cold sore is starting.
- The interval after oral retinoid treatment has not been planned and confirmed.
- Healing is slowed by an uncontrolled condition or a medicine, and nobody has adjusted the plan for it.
The list is short, and most of it is temporary. What matters is that it is asked about out loud.
Frequently asked questions
How long after oral retinoid treatment can fractional resurfacing be done?
That interval is set by your clinician and by the medicine you took, not by a general rule, and it is one of the reasons the medicine history has to be taken before anything is scheduled. Skin that is still affected by a retinoid heals differently, and treating it too soon is a route to delayed healing, which is the situation that most often precedes a scar.
Can I have fractional resurfacing if I have a keloid tendency?
Sometimes, on some areas, with a plan built around it. A keloid tendency makes scarring more likely after any treatment that removes surface, and on thin-skinned areas it can be a reason not to treat at all. It is not an automatic exclusion, but it is a reason for shallower treatment, a test spot, and a frank conversation about what happens if the skin heals badly.
Should active acne be treated before scarring is treated?
Yes. Treating scars on skin that is still breaking out is treating a moving target: new lesions keep forming while the older ones are being treated, and some acne medicines change how skin heals and when treatment can start at all. Acne is settled first, and the scarring plan is built afterwards rather than alongside it.
Risks & Limitations
- Each session leaves the treated skin patterned, warm and red for days, then flaking in fine pieces rather than peeling in a sheet, with pinkness that can persist for several weeks.
- Pigment change in both directions: darkening after a session is common and usually settles, while lightening is uncommon and may not recover.
- Infection while the treated columns are open, which is why antiviral cover is ordinarily prescribed; a cold sore starting across healing skin needs same-day review.
- A visible border where treated skin meets untreated skin, more likely when the two sides have been treated at different depths or in different sessions.
- Delayed healing in one patch, which is the situation that most often precedes a scar, and acne flare in the weeks after a session.
- The change from any one session is deliberately small, a course is usually required, and the improvement is long-lasting rather than permanent.
When to Seek Care
- Increasing pain after the first day or two instead of settling, or one patch much hotter and more swollen than the rest.
- Fever, spreading redness, or discharge from the treated skin.
- A cold sore starting across healing skin, which should be reported the same day.
- One patch healing far more slowly than the others, or a sore that is not crusting like the rest.
- Blistering, or dusky or grey patches appearing in the treated area.
References & Further Reading
- American Society for Laser Medicine and Surgery (ASLMS) — patient information on laser and energy-based treatment
- American Academy of Dermatology (AAD) — guidance on laser resurfacing and post-inflammatory hyperpigmentation
- National Institute for Health and Care Excellence (NICE, UK) — relevant guidance on skin treatments
- Cochrane Library — systematic reviews in skin resurfacing and scar management
This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.