Pimples can be extremely large and they can be fluctuant (soft and squishy) with yellowish white head. I had a patient walk in with one such pimple. I had to take an eleven blade- scalpel needle and pop the middle of it. The pimple pretty much exploded and splattered my face shield. I was smart enough to have the shield on because I knew that would happen. After I wiped off the splatter so that I could see I noted that it was not only yellow pus and excaudate there was quite a bit of blood oozing out. I noticed that there was an artery pumping. I had to tie off that little pumper. It was pretty exciting, that must have been the worst pimple I have ever encountered. The combination of the large pustule component and the blood, which came afterwards, made for the best pimple I have ever extracted.