I had a healed pimple on my face from 2 weeks ago. It had a tiny scab left and the area felt hard as a rock. Being the picker I am, I gave it a small squeeze and Bam! This surprise squirted out. I was impressed.
What is this? I get these hard sores for weeks and finally have to dig this little fucker out. The sores heal around it otherwise. Photo of hole in comments.