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Polyphagia or hyperphagia is an abnormally strong, incessant sensation of hunger or desire to eat often leading to overeating. [1] In contrast to an increase in appetite following exercise, polyphagia does not subside after eating and often leads to rapid intake of excessive quantities of food.
Many different illnesses can cause an increase in metabolic activity as the body combats illness and disease in order to heal itself. Hypermetabolism is a common symptom of various pathologies. Some of the most prevalent diseases characterized by hypermetabolism are listed below.
Hunger is a sensation that motivates the consumption of food. The sensation of hunger typically manifests after only a few hours without eating and is generally considered to be unpleasant. Satiety occurs between 5 and 20 minutes after eating. [1] There are several theories about how the feeling of hunger arises. [2]
Anorexia nervosa (AN), often referred to simply as anorexia, [12] is an eating disorder characterized by food restriction, body image disturbance, fear of gaining weight, and an overpowering desire to be thin. [1] Individuals with anorexia nervosa have a fear of being overweight or being seen as such, despite the fact that they are typically ...
Malnutrition is a category of diseases that includes undernutrition and overnutrition. [14] Undernutrition is a lack of nutrients, which can result in stunted growth, wasting, and underweight. [15] A surplus of nutrients causes overnutrition, which can result in obesity or toxic levels of micronutrients.
A woman, man, and child, all dead from starvation during the Russian famine of 1921–1922. A famine is a widespread scarcity of food [1] [2] caused by several possible factors, including, but not limited to war, natural disasters, crop failure, widespread poverty, an economic catastrophe or government policies.
The elderly have an increased risk of going hungry as well as increased negative effects of hunger. In the US the number of seniors experiencing hunger rose 88% between 2001 and 2011. [87] This age group suffers the most from chronic conditions, including heart disease, diabetes, and respiratory diseases.
Additional causes of hunger and food insecurity include neighborhood deprivation and agricultural policy. [1] [2] Hunger is addressed by a mix of public and private food aid provision. Public interventions include changes to agricultural policy, the construction of supermarkets in underserved neighborhoods, investment in transportation ...