What Causes Swelling Of Ankle And Soreness Of Foot Without Injury?

both ankles are swollen without being injury, bottom of foot is sore, wake up in the morning stiff and hard to move around, now I found two small under the skin bumps on my left leg, one is tender to the touch, once again no injury. i sit all day at work, and have 30 min ride to work and back home. I am sore and stiff when I get out of car. this has been going on for about a month.