I had a lump about the size of a golf ball under my armpit back in feb, it hurt so I went to urgent care and it turned out to be a staph infection sealed in an abcess
good part was it kept the infection from making me really sick, those things can put you in the hosplital
bad part was they had to cut it open which numbing it hurt, but they couldnt numb inside of it or under it so 2-3 cuts into, I wasn't numb any more
It hurt, it hurt a LOT