Feeling hungry all the time? This may well be because of some very normal circumstances. Perhaps you are pregnant, or putting in more effort than normal at the gym. However, there are also a number of different medical conditions which can also cause you to have a big appetite, termed hyperphagia or polyphagia.
Stress and Anxiety
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Stress causes the brain to make corticotropin-releasing hormone (CRH) and adrenaline, which actually suppress your appetite. But if this stress persists, the adrenal glands release the hormone cortisol, which serves to increase your appetite. In extreme cases, cortisol production may stay elevated causing excessive hunger.
Worm infestation
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Intestinal worms, such as Tape Worms can exist in the intestine for an extensive time, without you knowing. They typically rob the body of essential nutrients and proteins which cause you to feel more hungry more often and can be attributed to over eating.
Hypoglycemia
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Low blood sugar is another reason why you have a big appetite. Hypoglycemic symptoms such as hunger, fatigue, headache, confusion and shakes can be caused by over-exercising and not eating enough carbohydrates or by starvation dieting. In these cases, the hypoglycemia is short termed, and blood sugar levels are restored when you eat. But if you have liver disease perhaps caused by excessive alcohol consumption, the hypoglycemia becomes chronic and you have the urge to eat all the time.
Hyperthyroidism
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This is a an autoimmune disease affecting the thyroid. The thyroid serves to increase the body’s metabolic rate, so an over active thyroid will cause you to burn calories too quickly and hence increase the body’s appetite for fuel in the form of food.
Prader-Willi Syndrome
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PWS is a genetic condition and the most common cause of genetic obesity, due to the stimulation of an appetite hormone called ghrelin. Ghrelin is also responsible for the pleasure reaction to high calorie foods.
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