I am a 19 year old male. I noticed a small lump under my left armpit yesterday, it could have been there for days, i dont know, anyway i squeezed it because i thought it was a zit or something and no white pus came out, instead, blood. I left it alone after that. Today, it was a light purple and it isnt bigger or smaller but i tried to squeeze it again and nothing came out this time. I dont shave my armpits, i havent been sick lately and i havent switched deodorants.