[MISC] Coldsore scar swelling?

Hi guys, I had a bad cold sore a month and a half ago from my lip down my chin a bit and it left a scar. I don’t mind the scar too much, but now the scar is swelling a bit and looks kinda like a pimple is forming? Only on the scar on the chin and not the actual lip. I’m wondering if anyone else has had this before and if it’s another cold sore? I took acyclovir and started putting Abreva on it just in case, but mine get reallly bad and I just wanna know how worried I should be.