Gahee's C-bam, is it just me or does it sting? ㅠㅠ

It's been quite a while since I used it, but it still stings.

Maybe I'm just too sensitive, but I can't seem to adjust.

I've heard that C-series products usually sting, but

Is it normal for it to sting every time I apply it?

I received three bottles as a gift from my older sister.

If it keeps going like this, I'm worried about how I should apply it.