Some people new to exercise worry a lot about sweat. They shouldn't - sweat is completely natural and is a wonderful way to flush your system of toxins! People deliberately go to sweat houses :) But what if you do NOT sweat?
First, it is critical that no matter what you do in a given day that you drink a lot of water. Water is important for numerous body activities. It keeps the vitamins moving around your system, it flushes out toxins, and it keeps your body healthy in general.
Keep a glass of water by your side at your desk. Refill it regularly. Carry a bottle in the car with you for regular sips. You will find you are so much healthier and lose weight if you do this.
But let's say you are drinking a lot of water, and when you are active or hot you simply do not sweat. You stay dry. This is a medical condition called anhidrosis. It is important you talk with a doctor if you think this is happening.
Your body sweats naturally in order to maintain your heat levels at a reasonable level. High heat and fever can cause serious problems for your body, as you probably know. A healthy human can sweat out several quarts in a given day to regulate their temperature. If your body isn't sweating at all, that is several quarts of cooling that is *not* being done, which can lead to real problems.
Often this problem of not sweating happens with dehydration or heat stroke. But again, if you've been drinking water regularly and notice that you simply don't sweat when you are out and active, it's time to seek other answers. Are you taking any drugs that might interfere with sweating? You might have some sort of an infection which affects your sweat glands.
The key here is that a lack of sweat a very important thing to address. Only a doctor can help you figure out what is going on if it's not just a one-time situation. This is not something to ignore - if your body overheats it can cause permanent damage to your brain in a very short period of time.