What happens to air pressure beneath the ventouse during vacuum suction treatment?

During vacuum suction treatment, the primary action involves creating a negative pressure or a vacuum beneath the ventouse. This reduction in air pressure pulls the skin and underlying tissues into the ventouse, enhancing circulation and promoting drainage.

When the vacuum is applied, air is removed from beneath the ventouse, leading to a decrease in air pressure in that localized area. This reduction is what causes the suction effect that draws the skin into the cup. The manipulation of air pressure in this manner is fundamental to the effectiveness of vacuum treatments in improving skin health and stimulating collagen production.

The choices that do not indicate a reduction of air pressure do not correspond with the desired outcome of the treatment or the mechanics of how vacuum suction works. Therefore, recognizing that the air pressure beneath the ventouse is indeed reduced is key to understanding the principles behind its application in facial treatments.