What acne can do but is it really acne?

I have really bad acne at times, so i decide to get Clean and Clear acne cream for the most part it took away my acne. There is are sometime I get these things that look like acne but they are not. I fills up with puss and blood and they are very painful to me and sometimes they smell very bad. I use to get them on top of my head but i do not anymore. About two days ago I this on my face and thought I would use the acne cream but it did not do anything for it. It started to hurt. It hurt so much that if touch it, it is very painful. When I would lie on the left side of my face in bed it made me wake up because of the pain I had for it. I woke up today and i notice that left side of my face was swollen really bad.