Is this a pimple?

I took this photo a few days ago and I had just noticed it at the time because when my clothes rub it, it burns. Since this photo it turned into a whitehead that popped on its own (saw the pus and stuff on my shirt) it's still open and it still burns when it's touched by anything. This is my lower right abdomen (I'm a big girl so it's underneath my stomach fat)

I am clean person. I shower 2x a day and thoroughly dry every crease and fold.