Ask me how to solve old acne

hello!

I have a pimple on my chin that has been there for about a week.

I think it's because it's so big that it doesn't seem to get bigger or smaller.

If you just sit still, it's slightly convex, and if you put force on your chin, you can see a little bit of yellow.

It doesn't look like it's going to come out ㅜㅜㅜ

Should I get acne injections?