There are over 200 acupuncture points on the outer ear. The ear acts like a switchboard to the brain and each point triggers electrical impulses from the ear, via the brain, to the area of the body being treated.
Patients can be treated with needles and/or ear seeds (as illustrated above). The seeds can be left in place for several days to stimulate and benefit the relevant acupressure points after you leave the treatment. The patient can gently rub these seeds when they feel a re-emergence of their symptoms.
Auricular acupuncture can be used independently or in conjunction with other treatments and types of acupuncture. http://www.nadauk.com/nada-uk-conference-2012.html