Wierd lump substance

Patient: Today i noticed a lump in my armpit it wasnt necessarly painful but was uncomfortable it was not red or discolored and could only tell by feeling it when i touched it it opened up like a pimple but with a large amount of deodorant coming out I thought at first it was just a clogged pore and proceeded to remove the deodorant from the pore once the deodorant was removed a substance that appeared to be meat or fatty tissue followed out of the pore my armpit burned for atleast one and a half hrs after and is highly uncomfotable the pore is visibly open and altho the lump is much smaller is still there what is this and what should i do the fatty or meat substance has me worried

Doctor: