So if a lift note cannot be popped because it's solid what was under my armpit that i pop and white came out.. cuz i haveanother that wont pop?

I presume you are: asking about a lymph node. A lump that pops with white/pus drainage is likely an infected cyst resulting from a hair follicle or oil gland within the follicle becoming inflamed or infected. Opening (not popping) an cyst should be done very carefully and, really, by a health professional. This professional could also determine whether the lump is an enlarged lymph node or lipoma or ? See your Doc!