I perspire very little. I can work out at the gym, or even go for a walk and I get beet red and really hot, but rarely perspire. I am wondering if it could be hypothyroidism? This has gone on for years, but I seem to get hot quicker. Only a cold shower (or several of them) seem to help. I am in generally good health, work out 2-3 times a week, female, 57 yrs of age. Any other ideas?