The Role of Biochemistry in Healing

In reflexology, why does the foot reflect certain health conditions? If you stimulate certain points on the feet or if you stimulate certain acupuncture points perhaps in your ear, can it help your heart? It doesn't seem very logical, but the truth of our biology and health is basically everything is interconnected. So I tried it for my own sake of understanding, like, where do these energy, the fields come from? And then we wanted to pick up the field on the outside.