Hi I was wondering why I get a hot sensation in my right arm into my hand, and my hand stays hot for about 5-10 minutes sometimes longer. It takes awhile to go away.I have Marfan syndrome and my medial vain is gone, collapsed in 2007 after being real sick. But I noticed this now for about 6 months. There's no tingling or numbness just a rush of hot running fast through my arm ending in my hand.