People who experience prolonged hunger that is not satiated after an adequate meal may suffer from diabetes, thyroid imbalances, depression, hypoglycemia, Graves' disease or excessive stress, according to Healthline. Certain medications, such as corticosteroids, tricyclic antidepressants and cyproheptadine, may also contribute to exaggerated hunger.
It is normal for a person to feel hungrier than normal after engaging in intense physical activity, but if this sensation persists regardless of how much food is eaten, the individual may have hyperphagia or polyphagia, explains Healthline.
It is important to meet with a doctor to assess all related symptoms and diagnose the condition. Doctors are likely to question patients about their full medical history, any recent attempts to diet, whether their thirst is also affected, their fitness habits, any related drug or alcohol use and which medications they are currently taking, according to Healthline. It also helps doctors to know if a patient has recently been ill, is experiencing any vomiting, has had recent weight fluctuations, seems to be urinating more often or is experiencing feelings of depression.
Blood and urine testing are helpful tools for diagnosing a possible thyroid condition, notes Healthine. If a doctor is unable to find the cause of a patient's increased hunger through these tests, it may be necessary for the patient to see a psychologist or psychiatrist for a mental evaluation.