I have a small lump under my armpit that is very painful. It has been a week. Today, pus started to come out sbd when squeezed more pus came out accompanied by blood. I used ribbing alcohol to clean and then applied Triple Antibiotic cream.  I am not sure if that will make it better or worse.
It could have been an abscess that is pus filled swelling due to infection. You should go to a doctor nearby for Chat Doctor. Don't squeeze more nor keep touching it. Good day!!