Which sign is commonly associated with self-induced vomiting in bulimia nervosa?

Russell's sign is a hallmark indicator associated with self-induced vomiting in individuals with bulimia nervosa. This sign refers to the presence of calluses or scarring on the knuckles or back of the hand, which can occur as a result of the individual using their fingers to induce vomiting. The physical contact with the teeth during this process can lead to trauma that creates this distinct marking.

The development of Russell's sign is a direct result of the behavior associated with bulimia nervosa, highlighting the compulsive nature of the disorder and the physical consequences of self-induced vomiting. This sign serves not only as a physical manifestation of the illness but also reflects the individual's struggle with their eating behaviors and body image, making it an important clinical indicator in psychiatric assessments.

While halitosis and dental enamel erosion are also consequences of bulimia nervosa due to the acid exposure from vomited contents, they are not as distinct as Russell's sign in identifying the behavior of self-induced vomiting. Conversely, obesity is generally less associated with bulimia nervosa, as individuals with this condition often experience fluctuations in weight and may frequently be of normal weight or underweight.