My mother is 45 year old. Her overall body is well maintained but she has a large tummy. She does a lot of cardiac and yogic exercise but often complains about not sweating and her body getting heated up. According to a local doctor, this problem might arise due to insufficient amount of water intake but she takes around 2 to 3 litres of water everyday. Not satisfied with the doctor here, I knocked your door. What could be the possible reason for this.