Yes, tarsal tunnel is in the foot and I did not know about it before either. It is very much like carpal tunnel in the wrist except it is a nerve that runs in a type of "sheath" along the inside of the anke.
Either from injury or over use the swelling compresses the sheath/nerve and the front third of my foot is numb/asleep to the point it became very painful. Appartently it is not a concern for cyclist as this topic has had very little action. Glad to feel it was not caused by riding.
Would still like to know how long I may have to stay off of bike???