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Immunotherapy is a method of treatment which aims to stimulate or modulate the immune system with the intention of preventing the spread of disease or for therapeutic purposes. This is in contrast to immunosuppressive therapy which attempts to suppress or reduce the actions of the immune system.
Indian head massage is a type of massage therapy which originated in India as part of Indian traditional medicine, known as ayurvedic medicine, and is hence an alternative form of medicine for the Western world.
Information therapy is not a type of therapy in the healing sense of the word, but it is therapeutic in that it can be benefical when used alongside health care.
Infra-red therapy may refer to one of two different types of therapy which use infra-red light. The first is also known as laser therapy, or photobiomodulation, and uses low level, or near, infra-red as a form of chemotherapy treatment. This is an emerging field, and is becoming recognised as potentially important in the medical world. You can read more about laser therapy in its own entry.
Interpersonal psychotherapy is a brief (as in time-limited) psychotherapy which was developed as an out-patient treatment for adults with moderate or severe, non-delusional clinical depression.
Iridology, also known as ‘iridodiagnosis’, is an alternative medicine which works on the belief that our eyes are our windows to our whole body’s health and that by studying the eyes, practitioners can determine information about our health.
Isopathy therapy is a therapy which grew from homeopathy and hence has similar principles. But whilst homeopathy treats ‘like for like’, isopathy therapy treats the patient with the actual disease or things that are a product of the disease. However, many so-called vaccines used in homeopathy are actually a form of isopathy anyway.