Some people sweat excessively for no reason. This means that they sweat more in certain situations than they should based on the activities and temperatures in the situation. There are certain causes that take place and then result in excessive sweating. This includes certain diseases like diabetes, fever and malaria. Obesity, stress and heart attacks may also create excessive sweating in someone. It is very difficult to stop excessive sweating on your own.
However, it depends on the cause. If you have control over the cause like weight gain, then you can lose weight. To stop excessive sweating, most of the time you will need to consult a doctor. He may prescribe certain medications that can stop or prevent excessive sweating.