What type of disorder is characterized by the re-chewing and re-swallowing of food?

The type of disorder characterized by the re-chewing and re-swallowing of food is known as Rumination Disorder. This condition involves the involuntary and repetitive regurgitation of food, which is then either re-chewed, re-swallowed, or spitted out. This behavior typically occurs outside of a medical condition, meaning it is not due to a gastrointestinal disorder; rather, it is classified as a feeding or eating disorder in the DSM-5.

Individuals with Rumination Disorder may do this for various reasons, including an attempt to avoid discomfort associated with swallowing or other emotional factors. The behavior can lead to significant distress and can affect nutritional status if it interferes with normal eating patterns.

In contrast, Pica involves the consumption of non-nutritive, non-food substances, while Avoidant/Restrictive Food Intake Disorder is characterized by a lack of interest in eating or avoidance of certain foods leading to significant nutritional deficiencies. Anorexia Nervosa, on the other hand, involves intense fear of gaining weight and a distorted body image, leading to severe restriction of food intake. Each of these disorders presents distinct symptoms and diagnostic criteria that differentiate them from Rumination Disorder.