Based on the situation you mentioned, it is estimated that it is supposed to be inflammation of the fat pad under the heel bone. You can put a soft cushion in the heel, pay attention to reduce friction and pressure. At the same time, you can use traditional Chinese medicine foot soak to activate blood circulation and relieve pain. If the effect is not good and you have to walk long distances, you can do closed.
Less activity is good, so as not to aggravate the condition.