my husband has worked out in the cold all week this week... temps between 10 to 30 degrees.... on wed he started complaining of numbness & tingling on the right side of his face... an area that was uncovered. thought maybe it was a tooth ache; visit to dentist proved that to be wrong; not having sinus issues. today numbness and tingling is still there, associated with pain and the feeling/sensation seems to be spreading across the chin/lower lip area? could this be frostbite? and if so, what can we do to ease his pain? and hopefully get full feeling back? no obivious discoloration of skin.