There is a skin booster for cosmetics,
 for application like exosomes, and
 Rejuran, for medical devices, which is administered by injection.
 But my skin improved so much after receiving Rejuran
 that my friends followed me and
 one of them got Rejuran with me yesterday. I received Rejuran,
 but unlike me, my face is red and swollen.
 There are no needle marks or embossing, my face is just red and swollen.
 But as far as I know, Rejuran is similar to human DNA, so
 I thought there would be no side effects, but I guess that's
 why I asked about the hospital where my friend performed the procedure. I looked at it and went to a dermatologist,
 but the conclusion was that it wasn't a Rejuran side effect, but a nickel allergy;
When you inject with a needle, it's because the needle is metal;
If you have a nickel allergy, take skin booster injections with caution;