The term "energy medicine" has been in general use since the founding of the non-profit International Society for the Study of Subtle Energies and Energy Medicine in the 1980s. Energy medicine often proposes that imbalances in the body's "energy field" result in illness, and that by re-balancing the body's energy-field health can be restored. Some modalities describe treatments as ridding the body of negative energies or blockages in 'mind'; illness or episodes of ill health after a treatment are referred to as a 'release' or letting go of a 'contraction' in the body-mind. Usually, a practitioner will then recommend further treatments for complete healing.