I did the 7 mile jog this morning. I am not sure if it was just a scab falling off, or if I have another blister on my left big toe, but I seem to have some, well, jogging casualty. I bandaged it up quickly and my feet are now up. I don't think it's too much of an issue. I spent a third of 2013 in the hospital for a different foot injury so I am always concerned.