There use to be a green bump on my penis, and when I squeezed it a thing would come out. But today I squeezed it a little hard I think, and the green bump went away. But now there's a round lump under my skin where it use to be. Any answers? I'm really scared

There are many common infections (both men and women), some sexually transmitted, some not. We can't tell which it is online. Green might mean trichomonas, or trich. You do need a medication for it, available from a doctor/clinic only. It isn't a good idea to pop cysts yourself. You can drive one infection further in or you can get another one, such as bacterial.