Quoting aubrees-mommy:" ok so i have this pretty big lump/bump under my armpitt and it hurts SO BAD it has no head and its not ... [snip!] ... still no head and its even bigger now. i googled infected sweat gland and it doesnt loook like it. sounds familiar to anyone?"
actually my sister had something very similar to this. what it turned out to be was breast tissue growing. if you make an X across your body from your shoulders to your waist, this is called your milk line and you can grow breast tissue anywhere along this line. wierd i know. yes uncommon but it happens. im not saying that is what this is but it may be something for the drs to look into. good luck