Shopping Day -- Bad Idea

Well, decided to go to the flea market this morning.  What a mess.  My knees weren't hurting--as usual--but the throbbing.  Jeez.  We ended up walking plant nurseries while we were out.  I finally succumbed to the discomfort and requested we call it a day.  I went home and sat in a chair with a heating pad on my knees.  It's so weird because they don't hurt, but good grief they are uncomfortable.