As our skin matures, we often see more reactivity to a pH change. If the irritating feeling slows after a few minutes, it is more likely to be a pH sensitivity vs a reaction. This is the skin reacting to a change in their pH as a result of the product. To outline, when we use the Minty Meltdown, we take the skin's pH down. The Kalm Down Mask brings it back up. As the pH changes, some people feel some tingling until it is back up. This takes longer with more mature skin and can be mistaken for 'a reaction’.