Body Cat Injection for the arms: How many sessions are needed to feel a slimmer change?

I am stressed because the sagging fat on the inner arms is particularly stubborn compared to other areas. I am considering Body Cat Injection, a type of fat-dissolving injection, to manage my body shape.

Since it is an injection procedure, I am wondering if I feel slimmer after just one session, or if I usually need to go through a package of 3 or 5 sessions or more to see a difference in how my clothes fit.

I am also curious if the pain is bearable and if there will be any bruising or swelling after the injection.

Please let me know if anyone has direct experience with this procedure on the forearm.