Since yesterday, my right foot has been swollen. It started with pain in one of my toes. Gradually, the pain spread to the back of my foot, and the entire foot started hurting. By this morning, my whole right foot had become swollen and red. The pain has become very severe, and it is difficult to walk or put weight on it. I also noticed this morning that there was a swollen area on the lower part of my right leg. I am not sure if it is related, but it appeared around the same time as the swelling in my foot.