If you buy a fake, it may sting you. If it is genuine, the possibility is as follows: 1. It is caused by long-term water shortage and excessive hydration of the skin. This happens more frequently, and the tingling will appear more urgently, and it will be gone soon. When the skin is very dehydrated, the pores will suddenly shrink, and the nerve source will affect it, so it will sting for a while. In this case, you must add one more skin care product. The skin is like a flower. If you don't water for a long time, even if you water more later, the water will not be absorbed well and the flowers will die easily. So please be kind to your skin, whether it is oily or dry, whether it is winter or summer, you should pay attention to the supplement of skin moisture.

2, allergies, this situation is a long-term pain, but also accompanied by the phenomenon of getting angry, in this case, please immediately wash with water, and then ice with ice cubes through a towel, which can relieve the pain and calm the skin, but remember that the ice cubes must be separated by a towel, otherwise it is easy to get frostbite, and please go to the hospital for severe allergies. In addition, students with sensitive skin must do a local skin allergy test before using skin care products, and then use them after the test, so as not to have a stimulating reaction. After all, there are many reasons for skin sensitivity. No brand of skin care products in the world can guarantee that 100% is not allergic, so if your skin is sensitive, it is better to choose and use skin care products carefully.