The pad Just behind the toes will have reflexes that mirror the shoulder muscles on the opposite side of the body. For example a pain in the muscle that you can pinch between the top of the shoulder and the back of the neck [trapizius] has a reflex in the front of the pad behind the second toe. To relive this have the person lay on their back with the arm on that side across the front of the neck holding the opposite shoulder. This unloads the sore spot called a trigger point in the trapizius muscle. Go to the second toe of the opposite foot and gently pull on the toe which corresponds to the collar bone and will be reflexing to respond to that bone moving forward when crossing the arm over the neck. Check for the tender spot under the front of the pad behind the second toe and try to position the second toe so that the tenderness is minimal. Hold that position for 90 seconds to allow the reflex to cancel then rub out any residual in the foot or shoulder with a magnet. See http://magnet-therapy-how-why.com/triggerpoint.html for more information.
To review from the first page: If you were a contortionist and could set your right foot along side your body with the big toe parallel with your head you would be able to find all the landmarks of the left side of your body on that right foot. Therefore the top of the foot corresponds to the ribs. Because I tore the ligaments that attach the collar bone to the sternum the muscles that are attached to the front of my ribs that position the shoulder blade pull excessively and cause tender spots that ave even more severe reflexes on the top of my left foot. Because I can only conveniently work my left foot with my right hand I will have to train some one to do this for me.