My 23 year old son just called and asked what might make him feel Hot and Nauseous He is a non-smoker, non-drug user and takes no medicines or vitamins. He is about 5 9 and @150lbs in good health. This is not a usual thing for him. He said it started this morning and has gotten a little worse throughout the day. Heat seems to be a factor that increases the feeling of nausea. It is 72 degrees here and very cloudy - certainly not hot by typical standards but he feels like he is hot and when he called, said he was sweating a little. He has a very mild headache described as slightly tingly in his forehead area with a little but of ache or pain in the back area of his head. He had an eye exam this morning. he has mild seasonal allergies and a slight propensity for anxiety. Thoughts?