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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.
Dysphagia is the medical term for the symptom of difficulty in swallowing. Although classified under symptoms and signs in ICD-10, the term is sometimes used as a condition in its own right. Sufferers are sometimes unaware of their dysphagia.