When I go for an abdominal examination he puts a stethoscope to my tummy.Why is this?
Your stomach is a constant noise maker. This occurs as it pushes food and gas along creating gurgling sounds. If it starts to work harder as in gastroenteritis, it will make more noise, and if it stops working then it will make no noise.
Doctors learn to pick up clues to what might be wrong with you by learning what sounds are normal, which are abnormal, and what they signify.
Doctors like to listen to and feel your stomach so that 1. to know that you aren't constipated and 2. to make sure that your stomach sounds are normal.