Since 9/11 my left heel hasn't been right. Then in August in the Dominican Republic I did 30 minutes of Taibo where you really stretch your legs lifting the foot. I have pain under the heel, in the back of the heel and in the bone (archilles heel) left foot only.
I always liked my feet. I have a high arch which aches now and then in damp weather but until now (age 55) never had a problem. It could be a tear ...do you think so?