Polyphagia
Polyphagia means "eating too much." It derives from the Greek words πολύ (poli) which means "very much", and φαΐ (fai) which means "food".
In medicine, polyphagia (sometimes known as hyperphagia) is a medical sign meaning excessive hunger and abnormally large intake of solids by mouth.
Disorders such as diabetes, Kleine Levin Syndrome (a malfunction in the hypothalamus), the genetic disorders Prader-Willi Syndrome and Bardet Biedl Syndrome can cause hyperphagia (compulsive hunger).
Food Maintenance Syndrome
Food Maintenance Syndrome is characterized by a set of aberrant eating behaviors of children in foster care it is "a pattern of excessive eating and food acquisition and maintenance behaviors without concurrent obesity", it resembles "the behavioral correlates of Hyperphagic Short Stature". It is hypothesised that this syndrome is triggered by the stress and maltreatment these children are subjected to.
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Note: I had much difficulty finding information about these two disorders. If you have any suggestions, please do comment. I'd be very glad indeed to be able to improve this post!
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