I'm a 21 year old female. I worked for eight and a half hours today with tight shoes. When I came home after work and took my shoes off, on my right foot, to see that my large vein is swollen and looks like a weird lump. I tried touching it but it hurts so I'm wondering if its okay for me to go to sleep without worrying about it since this has never happened before nor do I know of it happening to anyone else.