It’s the time of year that we tend to think the warm, sweaty months have left us behind – not so for those with hyperhidrosis. There is normal sweating, and there is abnormal sweating. Simply put, hyperhidrosis is abnormal sweating. Our bodies sweat as part of our normal thermoregulatory control. This is because sweating is necessary in many circumstances to help us dissipate heat energy and therefore reduce our body temperature when we are overheated in environments such as being outdoors on a very hot day.