What is Russell's sign?

Russell's sign refers to the presence of calluses or scars on the knuckles or hands that result from repeated self-induced vomiting. This sign is commonly associated with bulimia nervosa, a type of eating disorder where individuals engage in episodes of binge eating followed by compensatory behaviors, such as vomiting, to prevent weight gain. The calluses occur as a result of the repeated contact between the hands and the teeth during the act of vomiting.

In the context of eating disorders, recognizing Russell's sign can be crucial for healthcare providers, as it serves as a physical indicator of the behavior associated with bulimia. This sign can lead to earlier identification of the disorder and facilitate intervention and treatment.