The face, ears and neck turning red sounds like a
hot flash. In women, those are often hormonally induced. It could be thyroid related, or maybe your hormones are fluctuating?
Regarding the artery in the groin that seems inflamed, swelled or raised, it might be something like a hernia, pulled muscle, inflamed nerve or something like sciatica? I get this thing in my neck that seems like an inflamed blood vessel, but my doctor told me that it was a nerve giving me that feeling.