BN is defined as having recurrent cycles of binge eating followed by some form of compensatory behavior, such as vomiting, with the intent to undo or compensate for binge eating. Binge eating occurs when an individual eats an abnormally large amount of food in a short period of time compared to what the average person would eat under similar circumstances (usually within 2 hours). It also includes a sense of impulsiveness or lack of control in regards to what and how much the person is eating during that specific time period. Generally the individual eats until feeling uncomfortably full and experiences feelings of shame and guilt leading to compensatory behavior, such as forced vomiting, in attempts to prevent weight gain.
Similar to the presentation of anorexia, bulimia involves intense preoccupation with body weight and poor body image. Unlike anorexia, individuals with bulimia are often at a normal weight which can make it difficult to detect this dangerous eating disorder. Frequent trips to the bathroom immediately after eating and disappearance of large amount of food are warning signs for bulimia.
(Adapted from the DSM-5)