This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
18 yr female with itchy erythema, swelling of toes every winter season seen due to 
Select and explain. 
A. Raynauds disease, B. Raynauds phenomenon, C. Chilblains, D. Frost bite
C: Chilblains
Answer: C: Chilblains 
Explanation: Answer- C. ChilblainsAlso known as pernio, It is an inflammatory skin condition presenting after exposure to cold as pruritic and/or painful erythematous to viloaceous acral lesions.It may be idiopathic or secondary to an underlying disease.