Here are diagrams of the corresponding organs with the areas of the feet. I have taken these pictures from a healer in Thailand- you can enlarge the picture by clicking on to it.
Each section on our feet- from the side, top to bottom corresponds to certain parts of our organs. Of course, sometimes pain and numbness in certain areas of our feet could be due to postural imbalances, occupational hazards or wearing uncomfortable shoes (like heels). But it can also be an indication of certain ailments in our body.
The diagrams can be used as a guide.
The reflective zones of the medial foot (left foot)