Some of this is measured, some is mechanism. Both are labelled here.
One thing that does not appear to affect it: in the studies above the improvement measured at 6 months was equal to or slightly better than at 3 months, so there is no published sign of an early drop-off you need to chase.
Immediately. Histology shows partly denatured collagen and dermal shrinkage straight after treatment. That is a heat effect, not new collagen.
1 month. Modest. In the split-face trial with an untreated control, midface volume change at 1 month was not yet significantly different from the untreated side.
3 months. This is usually where the measured effect peaks or nearly peaks. It is also when the split-face trial first showed a significant difference from control.
4 months. A biopsy study found increased elastin and collagen at 4 months after a single session, which is the clearest published evidence of the biology behind the clinical change.
6 months. Held, or slightly better. Wrinkle counts in the split-face trial were 11.11 at 6 months versus 12.44 at 3 months on the treated side.
Beyond 6 months. No controlled data, for any device in the class.
This is set out in full on How Long Does Morpheus8 Last, so the short version. In essentially every controlled study in this device class the last measurement is taken at 6 months, and what is measured there is reassuring within its limits: Xiao and colleagues' 98-patient neck series reported 75.1% average improvement at 6 months in the 3-session group, very slightly better than at 3 months, and a critical review of 42 higher-quality studies concluded that remodelling is "slow and progressive but continue[s] to improve even 6 months after treatment." Read that precisely - it is a statement about continued improvement up to 6 months, not about durability at one, two or three years.
Two papers are quoted as though they show a year of results. In Xiao 2021 the 12-month figure covers 6 of the 98 people. In Clementoni and Munavalli 2016 the objective photographic endpoint was at 6 months - the cervicomental angle, the angle under the chin, changed by 28.5 degrees and the gnathion angle by 16.6 degrees - and the 12-month datapoint is a telephone satisfaction survey rather than a measurement of the skin.
Nothing has been measured past 6 months with any device in this class. That is not the same as knowing the result stops there.
It is not in the literature. It is a figure that circulates in clinic and marketing copy, and it has no published source behind it. No study has followed patients to 2 or 3 years with any device in this class.
There is a second problem with any long-range durability claim, and it is more interesting than the first. Radiofrequency microneedling does not stop skin ageing. So if someone did measure a face at 24 months and found it back where it started, there would be no way to tell how much of that was the treatment wearing off and how much was two more years of ordinary ageing. No published study has separated the two.
The same gap applies to the standard advice to come back annually for maintenance. It is a reasonable-sounding practice pattern with no published evidence base, and it should be described that way when it is offered to you.
If you get cold sores, tell your provider when you book - not on the day. Antiviral medicine is started in advance. There is no published data on cold-sore reactivation after RF microneedling specifically; the practice is carried over from laser resurfacing, where reactivation is well documented.
Go to urgent or emergency care the same day if you have signs of a spreading infection:
Microneedling makes thousands of tiny channels in the skin, so a local infection can spread across the treated area. This is not something to wait out until your next appointment.