If there is any pain in the areas of the foot such as: Talus, Navicular, Intermediate or lateral cuneiform; then that is a sign of cyanide poisoning accumulating in those areas that will eventually be expelled through the toenails. Take a 3/4 fist, which is also known as a leopard paw in king fu, and massage those areas from front to back in an up and down motion as opposed to side of foot to side. Relief there would be an indication of accumulated toxins. Hope you feel better. God Bless.