Reflexology, also known as zone therapy, is an alternative medicine involving application of pressure to the feet and hands with specific thumb, finger, and hand techniques without the use of oil or lotion. It is based on a system of zones and reflex areas that purportedly reflect an image of the body on the feet and hands, with the premise that such work effects a physical change to the body.
There is no convincing evidence that reflexology is effective for any medical condition.
Reviews from 2009 and 2011 have not found evidence sufficient to support the use of reflexology for any medical condition. A 2009 systematic review of randomized controlled trials concludes: "The best evidence available to date does not demonstrate convincingly that reflexology is an effective treatment for any medical condition."
In 2015 the Australian Government's Department of Health published the results of a review of alternative therapies that sought to determine if any were suitable for being covered by health insurance; reflexology was one of 17 therapies evaluated for which no clear evidence of effectiveness was found.
There is no consensus among reflexologists on how reflexology is supposed to work; a unifying theme is the idea that areas on the foot correspond to areas of the body, and that by manipulating these one can improve health through one's qi. Reflexologists divide the body into ten equal vertical zones, five on the right and five on the left. Concerns have been raised by medical professionals that treating potentially serious illnesses with reflexology, which has no proven efficacy, could delay the seeking of appropriate medical treatment.
The Cochrane Collaboration defines reflexology as follows:
Reflexologists posit that the blockage of an energy field, invisible life force, or Qi, can prevent healing. Another tenet of reflexology is the belief that practitioners can relieve stress and pain in other parts of the body through the manipulation of the feet. One claimed explanation is that the pressure received in the feet may send signals that 'balance' the nervous system or release chemicals such as endorphins that reduce stress and pain. These hypotheses are rejected by the medical community, who cite a lack of scientific evidence and the well-tested germ theory of disease.