An example of biomechanical causes and treatments for foot blisters according to anatomical location. This is general advice only and should not to be seen as specific advice for your blisters! (Psoas Release New Years)
To roll out your Psoas, lie face down on the ground with a ball on some books. Place the ball on the books in your abs above your hip to one side of your belly button. Relax over the ball and lie face down on the ground.