Consider the effects of stress on the body. Stress really only exists only in the mind, but it can have an extreme effect on the body. Many experts will highlight that 85% of all medical conditions are as a result of prolonged and enduring stress. EFT works on those subtle electrical energy flows throughout the body that need to flow freely in order to balance our mental and physical well-being. If the energy flow is blocked then we continue to 'feel' the effects of the blockage emotionally and eventually physically if the channels remain blocked.
EFT is sometimes likened to Acupuncture without needles.
Medical science has mostly concentrated on the symptoms of an illness and the chemical effects of the body, EFT however concentrates on the subtle yet very powerful energy flows throughout the body and how treating these then affect change on the the symptoms and chemicals throughout the body.