An ampoule is a small, sealed glass jar that contains a liquid medicine of some sort. However, in the context of skincare, an ampoule is a highly-concentrated liquid treatment designed to help address a specific skin concern, like dark spots and discolorations. They are usually described as supercharged serums with higher concentrations of active ingredients. Ampoules are designed to deliver small, targeted dosages in order to address a specific skin concern. They typically come in small, sealed packages and usually contain just enough product for a single application. Ampoules are usually meant to be used for a finite amount of time, as a booster or when youre having a skin crisis of some sort. They can be used as a replacement for a serum or added to a moisturizer to increase its power. Ampoules are usually opened by snapping off the neck and the contents are applied to the skin by dabbing it onto the face and massaging it until it gets absorbed completely.