This isn’t a pop but it’s what I find once a month between my big toe and the one next to it! Dead skin and sebum mixture, with hair coming out of it! About the size of a dime. Fun, huh?!
TL;DR - a formerly benign cyst went haywire when my immune system ramped up to fight covid. Had it lanced, then I was allergic to the antibacterial infused bandaids I bought to cover it. I'm in hell.