Overheating and a tomato red face.?

Well I think you should see a doctor about that. You might have an issue with high blood pressure. Does either one of your parents have high blood pressure if so, when were they diagnosed with it? It could be genetic. There is something causing you to get over heated other than just working out in school when you have gym. I would recommend seeing your doctor and having a physical. He/she should be able to find out what's going on with you and your body. You should not be getting over heated that easily and the nose bleeding is a sign that there is something going on more than just getting a little hot during gym cl. So either you or your parents need to take you to see a doctor who can check you out. Best of luck!! =)