It started at my ankle, just sore, then moved to swelling and redness, now it is painful all the way to the top bridge of my foot. No incident that caused immediate pain, really stiff in the morning. I have to choice but to teach my classes (I am a fitness instructor) and was wondering what I could do to lessen the pain. It feels somewhat better after I can slowly work the muscle by pointing and flexing foot, and worse if I don’t move or work the muscle/tendon. Suggestions? Causes?