What is Russell sign?

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Multiple Choice

What is Russell sign?

Explanation:
Russell sign is a physical sign of self-induced vomiting, shown by calluses on the knuckles (the dorsal surface of the hands) from repeatedly pressing the teeth against the knuckles during vomiting. This friction leads to hardened skin and is a classic clue for purging behaviors in eating disorders, especially bulimia nervosa or anorexia nervosa with binge-purge subtype. Other described injuries—calluses on elbows from scratching, bleeding on the lips from biting, or scars on the wrists from injection—do not reflect the vomiting-related mechanism and point to different behaviors or conditions.

Russell sign is a physical sign of self-induced vomiting, shown by calluses on the knuckles (the dorsal surface of the hands) from repeatedly pressing the teeth against the knuckles during vomiting. This friction leads to hardened skin and is a classic clue for purging behaviors in eating disorders, especially bulimia nervosa or anorexia nervosa with binge-purge subtype. Other described injuries—calluses on elbows from scratching, bleeding on the lips from biting, or scars on the wrists from injection—do not reflect the vomiting-related mechanism and point to different behaviors or conditions.

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