Hi. I have been having pain from prolonged walking at my job. Its a tender pain on the top and outer side of my right foot, right at the extensor digitorum brevis muscle. There is slight rednes at this muscle and the pain is most intense when picking up the foot or when moving pointing the forefoot up or down. The ext. Dig. Brev. Muscle is also tender to the touch. I have been working on a slippery kitchen floor with no non slip shoes, if that makes a difference. I had surgery twice as a kid on this foot, so the left foot is about an inch longer than my right. I have always been very active but, but have never experienced this condition until now. My question is what causes this inflammation and how can I treat and prevent it? Thanks.