Why am I getting pimples all of a sudden?

I have these two red pimples but I wash my face & moisturize everyday. I don't put on any makeup cause I'm not going anywhere but when I do, I use moisturizer & Maybelline Dream Mousse Blush. Then I just put eyeliner & mascara. That's it ! Is it because of the heat? I don't sweat because its not that hot in my house. HELPP !