Your skin does not ‘purge’.
If you start using a new product and suddenly have a face full of spots/redness/swelling – that product (or machine) is not for you.
There may be a risk of slight exacerbation of spots if you are acnaic and suddenly use a product high in salicylic acid for example, but that should not last for weeks on end.
I often hear things being sold saying ‘this may make your skin purge for a while, but then it will be GREAT!’.
The reality is probably closer to ‘this may give you a face full of spots, either because the ingredients are comedogenic, or your skin does not like some of the ingredients’.
The odd whitehead, i.e. proper traditional spot – appearing after using a new product is no big deal.
An angry red face with a mixture of swollen-won’t-come-to-a-head spots, cysts, whiteheads and blackheads is not purging. It’s your skin begging you to stop whatever it is you are doing. Listen to it.
Personally, even if my skin was bubbling under the surface like a dormant volcano, I’d rather treat it gently, use good facial plant based oils, massage it well and let it works it way through it. I don’t want to use something that makes it erupt.
Hey ho. That’s just moi.