A cooling or tingling sensation is a sign that your skin-care product is really working.
清涼的感覺說明產品起效?

Fact: This common myth couldn't be further from the truth. That familiar tingling sensation is actually just your skin’s response to irritation, resulting in inflammation and other problems. Products that produce that sensation can actually damage your skin's healing process, making scarring worse, causing collagen and elastin to break down, and increasing the growth of bacteria that cause pimples. Ingredients such as menthol, peppermint, camphor, and mint are counter-irritants. Counter-irritants are used to induce local inflammation in an effort to reduce inflammation in deeper or adjacent tissues. In other words, they substitute one kind of inflammation for another, which is never good for skin. Irritation or inflammation, no matter what causes it or how it happens, impairs the skin's immune and healing response. And although your skin may not show it or doesn't react in an irritated fashion, if you apply irritants to your skin the damage is still taking place and is ongoing, so it adds up over time. Gentle is a key aspect of any skin care routine for any skin type. Inflammation and irritation is universally bad for skin.