I have a Lumpy mole in my armpit, been there since a child. It has been sore a larger than normal with a small pin point black head. Today I sqeezed it and A large amount of brown stuff came out along with what looked like black fuzz. Should I be alarmed? This has never happened in 30 years.
As your description goes it is a dermoid cyst though it can only be confirmed after examination of the same. Currently, it is infected and hence needs treatment, kindly consult a surgeon at the earliest.