It is almost impossible to burp while you’re lying down. If you want to make yourself burp, make sure you’re standing or at least sitting in an upright position. This will help the gases that are trapped with your food to travel up with ease.
Heavily carbonated drinks, or commonly known as fizzy drinks, also help in inducing a burp. It helps if the drink is warm to make the fizz in the drink more. These drinks help in adding more gases to the stomach, while helps in bringing other gases up to your esophageal sphincter and out of the system in the form of a burp.
Another great way of burping on command is by closing the mouth and nostrils so that additional air is not inhaled as you breathe. Exhale while swallowing your saliva and the exhaled air, which will help to provoke a burp.
Rubbing the middle of your back and exerting pressure stimulates the air that is trapped inside is another way that helps in instigating the gases to move up and come out in the form of a burp.