Background: In some days there are something like "acne" on my face. Actually I don't know is it acne or pimples (I don't know the difference between them). It is something that rises from the skin and after few days, its tip will become yellowish. Inside of it there will be a yellowish liquid and also a yellowish material. And this cause to make black marks if I ignore it, or there would be scares if I try to remove it.
Question: How can I react to such thing( I call it acne, but I don't know whether is it an acne or pimple or something else), without getting any marks on face in future?
How I try to hacking it: I suppose they may be the older stage(or the adult version) of whiteheads that appears in the skin. And I try to remove all whiteheads as best as I can, at their primary stage. But this method even doesn't give me a good result.