What is it? Wikipedia explains Reflexology (which also includes hands and ears) this way:
The Reflexology Association of Canada defines reflexology as:
"A natural healing art based on the principle that there are reflexes in the feet, hands and ears and their referral areas within zone related areas, which correspond to every part, gland and organ of the body. Through application of pressure on these reflexes without the use of tools, crèmes or lotions, the feet being the primary area of application, reflexology relieves tension, improves circulation and helps promote the natural function of the related areas of the body."
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 general medical community, who cite a lack of scientific evidence and the well-tested germ theory of disease.
Naturally, Western medicine will categorize anything it can't explain as bogus, but if it works why not give it a try. It's not as if it can harm you.
Firmly press the affected point with thumb for 5 seconds and then release for 3 seconds. Repeat for 2-3 minutes for 5 to 10 days.
Source of chart and instructions: Sungazing Facebook