I’m unsure if this is the right place to post bu I’ve found a lump under my armpit about 8 months ago. It was no bigger then a pea in size. But as the months have progressed the lump has grown it feels quite hard. It’s a realy big lump now but not visible if I was to put my arm up. It’s causing minimalistic pain once every 5 days and that’s normally when it enlargens and I think maybe it’s pressing against a nerve/vein. Not only that but my armpit has become a very slight shade of purple not too noticeable but I noticed it the other day. Should this be something I should be concerned of?