Tight Swollen Feet Causes Swollen Feet. Why?????

Swollen feet. Why????? - tight swollen feet causes

Today, when my shoes too tight. After removal, I noticed that my feet are slightly swollen. Also on my left big toe was red and it hurts when I touched it. It's never happened before. What is fever? What are the possible causes?

ps I wore dress shoes all day, but they are very comfortable and I was sitting most of the time.