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A neurological syndrome of gross overeating. Also known as hyperphagia. This condition can be caused by very normal things like an increased exercise regimin or a growth spurt, but can also be caused by more severe issues like depression.

Example: A brain-injured man gains over one hundred pounds in the first year after his injury; he seems unable to control his food intake.’

Here is a very in-depth web overview of the condition, it’s causes and what to look for if you think someone has developed this issue: http://www.medicineonline.com/articles/p/2/polyphagia/excessive-hunger.html

APA Reference
Fournier, G. (2016). Polyphagia. Psych Central. Retrieved on July 18, 2018, from https://psychcentral.com/encyclopedia/polyphagia/