Well… that didn’t turn out to be much fun, I regret to own up. One of the products I got is Hyaron:
Hyaron 10x2.5ml - FYAB.
I had bought it as something to play around with to perfect my injection technique / procedure before moving on to the really good stuff since it had the lowest retail value of all the other mesotherapy products. After much research I injected it with the ez meso gun and when I noticed the little bumps under my skin, I figured that’s great as it means the product has made it where it needs to be and will get absorbed soon. Well… that’s not how it panned out. This was a LIGHTLY cross linked HA product, meaning it had a bit of slip / viscosity. And yes it’s meant to be injected superficially as mesotherapy but if you read the fine print — not literally, by that I mean if you research some MORE on YT beyond the first obvious results — it turns out that it can also act as a light, fluid filler when injected deep in the skin. And this became a problem as the meso gun injects directly into the skin at a straight angle, not at roughly 15 degrees as one would with a single needle, and as I was too chicken to try though I should have. So the bumps persisted and I’ve only slowly been able to smooth them out after throwing my kitchen sink of devices at my face: TECAR, local dynamic micromassage, radiofrequency, even friggin’ shockwave therapy! Yes, shockwave, on my CHEEKS! Otherwise those bumps would have settled there for months —
I shudder at the thought.
It took days to get them to smoothe out and even now I have a tiny bit of surface irregularity where I made the injections. I have something in the neighborhood of post inflammatory hyperpigmentation going at the injection points too, because there was trauma from squeezing a thickish, viscous substance around 1-2mm deep. Thankfully I have skin that doesn’t hyperpigment from trauma and the dark / bruised spots are fading every day and should be completely gone in about a week or two max but… I went into this with almost glass skin. Now it’s … I don’t know what to call it, decent quality parchment paper? 
Be careful what you do at home, boys and girls.
This makes me skittish to try out the other products or even to try hyaron one more time and inject it as God intended, i.e., with a mini needle right under the skin. I’m waiting for my dermaelectroporation device to arrive this Thursday and will “inject” a skin healing cocktail I ordered with my stash and that should hopefully help speed up the fading process but it will take me some time to get brave enough to do needles again, even though I fully understand where I went wrong and how to fix it.
This seems pretty cool by the way and I’m excited for it as a lot of the supplements I take in rotation have solid data behind them as skin injectables so I can take them out of the pill, dissolve them in water (well this only works for the water soluble compounds) and apply the solution topically. The machine makes sure most of it makes it past the skin barrier.
https://aexelbiomed.com/dep/