Polyphagia
A symptom of abnormal hunger, often linked to diabetes.
Polyphagia, also known as hyperphagia, is an abnormally strong, incessant sensation of hunger or desire to eat that often leads to overeating. Unlike increased appetite after exercise, polyphagia does not subside after eating and frequently results in rapid intake of excessive quantities of food. It is not a disorder by itself but rather a symptom indicating an underlying medical condition, most commonly associated with abnormal blood glucose levels and uncontrolled diabetes mellitus.
- field
- Medical symptom
- known_for
- One of the '3 Ps' of diabetes mellitus (along with polydipsia and polyuria)
- associated_conditions
- Diabetes mellitus, hyperthyroidism, Prader–Willi syndrome, Kleine–Levin syndrome, and others
Quick Facts
- Specialty
- Endocrinology, Psychiatry
Facts from the source article.
Lore & Background
Polyphagia is frequently a result of abnormal blood glucose levels, both hyperglycemia and hypoglycemia, and is one of the three classic symptoms of uncontrolled diabetes mellitus. In type 1 diabetes, it probably results from cellular starvation and the depletion of cellular stores of carbohydrates, fats, and proteins. In type 2 diabetes, polyphagia is usually not as apparent as in type 1.
Reader's Guide
Polyphagia is significant as a key diagnostic symptom, particularly in diabetes mellitus, where it forms part of the '3 Ps' alongside polydipsia and polyuria. Its presence alerts clinicians to possible underlying metabolic or endocrine disorders. The symptom is not an eating disorder by itself but is one of several diagnostic criteria for bulimia. Understanding polyphagia helps in identifying conditions ranging from diabetes to rare genetic syndromes like Prader–Willi syndrome and Kleine–Levin syndrome. The etymology of the word, from Greek roots meaning 'very much' and 'eating,' reflects its defining characteristic of excessive hunger. Its recognition in various diseases underscores its role as a broad clinical indicator rather than a standalone condition.
Did You Know?
- Polyphagia does not subside after eating, unlike normal hunger after exercise.
- It is one of the '3 Ps' commonly associated with uncontrolled diabetes mellitus.
- The word polyphagia comes from Greek words meaning 'very much' and 'eating.'
- Impaired leptin signaling in vagal nerve receptors can cause hyperphagia.
More in Symptoms and signs: Endocrinology, nutrition, and metabolism 1-21
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