After temple filler, only one side was swollen.

I had temple filler once about 2 years ago and
 it had never been like this before.
 I am a person who has had a lot of fillers here and there and
 I have almost no swelling.
 But this time, I was having milia removed on my face and
 my temples looked saggy, so I also had temple fillers
 done on the right side. I did it on the left side.
 After the left side was set, the doctor told the nurse
 to get some ice
 and pressed the ice pack on my left arm
 .
I asked why he was doing that and he said it was because he touched a blood vessel?
He said it was swollen.. It will subside after a few days, so don't
 worry.
 It's not the first time I've had temple fillers, but he said this is the first
 time something like this has happened. He casually says that it happens
 often
 and that it will take about a week , but it's really the first time I've ever had something like this. But
 it's because the doctor did it wrong, right? ?
Removing milia costs almost 250,000 Won, and
 the filler is also from Attier. Other places say it costs around 50,000 Won, but
 here it costs around 80,000 Won, and
 I only do 0.5 cc each in the temples,
 but the director says I have to put 1 cc each in the temples,
 otherwise it won't be noticeable, so
 1 cc on each side. I put it in,
 but I don't know if it's because it's swollen now, but the left side is like my forehead.
It's borderline and really annoying.
 I've been using 40% for milia and fillers.
 I should have just done it separately because it's cheaper and better
 , but is it right to swell like this??
It's on the right in the photo