Chest acne, bug bite, or something else?

I get a lot of acne on my chest but I noticed something this morning that wasn’t there yesterday that I haven’t seen before. It looks like it could just be a large boil on my breast but as large as it is & how quickly it formed worries me. Is this something I should get checked out? It doesn’t itch & from what I can tell it doesn’t hurt. It’s just very large & bothersome knowing it’s there. It’s roughly the size of a quarter.