My wife's hands are purple on the knuckles only. They appear dirty but there is no dirt on them. She's says they feel dry due to the cold winter air. Is it just dry skin or something more serious?
The purple discoloration on your wife's knuckles, despite appearing clean, could be due to Raynaud's phenomenon, a condition causing blood vessel constriction in response to cold temperatures, or it might be a sign of poor circulation, dry skin, or a nutritional deficiency; to rule out any underlying conditions, consult a dermatologist