wow... i am not the only one in the world then!!! my mom and i both have it!!...she gets them if she wears elastic for too long!, preassure of the undergarment, pants, shoes....strange////me too!! i have heard it is stress related....(my kind)!!! i take a bath and benadryl...if it gets to your neck it can be very dangerous!!! what you see outside of your body it is also happening inside...once i was choking!!! be careful!!!