Which finding is most specific to purging behaviors in eating disorders?

Which finding is most specific to purging behaviors in eating disorders?

• A. Sore throat
• B. Brittle nails
• C. Finger calluses
• D. Constipation

Answer: (C)

Purging behaviors leave a very specific physical sign related to the act of vomiting. Repeatedly placing fingers in the mouth to induce vomiting causes friction and thickening of the skin on the knuckles and the dorsal surfaces of the hands, known as Russell’s sign or finger calluses. This finding is highly specific for purging. Sore throat can occur after vomiting but is nonspecific and can result from many conditions. Brittle nails reflect nutritional status or other health issues and are not unique to purging. Constipation can arise from dehydration, dietary factors, or laxative use, but it’s not as specific to purging as the hand calluses are. Recognizing finger calluses helps you suspect purging behaviors and prompts appropriate screening and care.

Purging behaviors leave a very specific physical sign related to the act of vomiting. Repeatedly placing fingers in the mouth to induce vomiting causes friction and thickening of the skin on the knuckles and the dorsal surfaces of the hands, known as Russell’s sign or finger calluses. This finding is highly specific for purging.

Sore throat can occur after vomiting but is nonspecific and can result from many conditions. Brittle nails reflect nutritional status or other health issues and are not unique to purging. Constipation can arise from dehydration, dietary factors, or laxative use, but it’s not as specific to purging as the hand calluses are. Recognizing finger calluses helps you suspect purging behaviors and prompts appropriate screening and care.