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In medicine, polyphagia (sometimes known as hyperphagia) is a medical sign meaning excessive hunger and abnormally large intake of solids by mouth.auses of increased appetite include: 1  Anxiety. 2  Depression. 3  Certain drugs. 4  Diabetes mellitus. 5  Hyperthyroidism. 6  Hypoglycemia.
Aerophagia (var. aerophagy) is a condition of excessive air swallowing, which goes to the stomach.Aerophagia is associated with chewing gum, smoking, drinking carbonated drinks, eating too quickly, CPAP air pressure (if it is too high) and wearing loose dentures.erophagia is a dangerous side effect of noninvasive ventilation (NIV) , commonly used in treatments of respiratory problems and cardiovascular critical care or in surgery when a general anaesthetic is required.