Deep breathing and coughing helps keep your lungs clear. If you’ve had surgery, it will help you get better faster. It may also prevent a lung infection. If you have lung problems, it will help you breathe better. Follow the steps below.
Breathe in slowly and deeply through your nose.
Then breathe out fully through your mouth. Repeat.
Take a third deep breath. Fill your lungs as much as you can.
Cough 2 or 3 times in a row.
Try to push all of the air out of your lungs as you cough.
Then relax and breathe normally.
Repeat as directed.