there are three chambers to the lungs and to listen to all of them efficiently-the dr has to put the stethoscope in 4 different places. once on your upper back (near your shoulder blades), once on the sides of your waist, once on your lower back and then in the front at the center of your chest which is close to your heart.
Chewing gum can also lead to swallowing air, which can cause bloating. If you've got a gum habit, alternate chewing gum with sucking on a piece of hard candy or eating a healthy, high-fiber snack like fruit, vegetables, or lower-fat popcorn.
Common causes of gas and bloating include: 1  Swallowed air . If swallowed air is not burped up, it passes through the digestive tract and is released through the anus as flatus. 2  Foods and beverages . The amount of gas that different foods cause varies from person to person. 3  Lactose intolerance .