Bubbles in beer are carbon dioxide gas that dissolves in beer under high pressure. Usually the beer bottle lid tightly covers the mouth of the bottle, so that the bottle maintains a certain pressure, the carbon dioxide in the beer will not come out.
< br >
Once the cap is lifted, the pressure is lowered, and the carbon dioxide gas dissolved in the beer escapes from the beer as a large number of bubbles rise.
The beer will be filled with a certain amount of co2 during the production process, in order to give the beer the feeling of killing mouth. That tingling sensation we get when we drink it. When the wine cap is opened instantaneously, the pressure inside the bottle changes, the volume of co2 dissolved into the wine changes, and it expands, which is what we see as bubbling