Fruit acids, like those from blueberry in this mask, work on the skin's surface to help loosen dead cell buildup. This action can cause a tingling sensation, which is normal but may be more noticeable on sensitive or reactive skin. The product is formulated as a mask, which means it's applied for a short period then rinsed off, reducing prolonged exposure.
If your skin is very sensitive, patch test first by applying a small amount to your inner forearm or behind your ear and wait 24 hours. Avoid using the mask on irritated skin or if you experience discomfort during testing. Also avoid the eye area unless the manufacturer specifically allows it. This mask may be a good option for normal or combination skin that looks tired, but those with highly reactive skin should proceed cautiously.