Why do doctors tell you to take a deep breath?
Matthew Alvarez
Published May 12, 2026
Your doctor will also instruct you to take deep breaths while they listen. Deep breaths use the entire lung and thus provide more information if something's going on deep inside. They're looking for abnormal sounds, which can point to a potential health problem.
What can a doctor tell by listening to your lungs?
Fluid in the lungs: Doctors listen for absent or decreased breath sounds to determine if you have fluid blocking your breathing, which can be caused by pneumonia, heart failure, and pleural effusion. Rhonchi, a snoring-like sound: This sound occurs when air is blocked or inhibited through your large airways.What are doctors feeling for when they feel your neck?
There are a couple reasons we feel your neck: we check your lymph nodes and your thyroid. Feeling your neck and under your ears is a way to see if your lymph nodes (often referred to as glands) are enlarged. It's normal for them to increase in size when your body is fighting an infection.Why does the doctor listen to your belly?
Pressing on your stomach is a way to find out if the size of your internal organs is normal, to check if anything hurts, and to feel if anything unusual is going on. Looking, listening, and feeling are all part of a physical exam.Why do doctors tap your chest and back?
Tap Your BackThat tapping action has a name: “percussion.” And just like a drum, your lungs have air that carries sound. That sound can let your doctor know if there is liquid inside your lungs, which can happen if you are sick. Fluid in your lungs can signify emphysema, heart failure, or cancer.