Why does this mask bubble, and is it supposed to fizz like this?

The fizzing action you see is a deliberate cosmetic feature known as an oxygen-activated bubbling effect. Once the package is opened and the mask is applied to your skin, the formula begins to foam and create tiny bubbles. This light fizzing action is designed to help loosen buildup around pores and provides a fresh, cleaner feeling on the skin surface. It is important to understand that this is a standard foaming reaction common in cleansing cosmetics, not "oxygen therapy" in a medical or physiological sense. The bubbles help lift away excess sebum, urban residue, and other surface impurities, particularly when skin feels congested or looks dull. If you are new to bubbling masks, the sensation may feel unusual at first, but it is a normal part of how this specific charcoal-based formula works to cleanse the skin without requiring vigorous rubbing.