Why does my skin become poor and dark yellow when the weather is hot, but it is very good and white compared with winter?

Hello, considering what you said, this is the characteristic of most people in our country. In summer, the temperature is high, pores grow, ultraviolet rays are strong, and the skin is dull. Skin care generally needs cleaning, hydration and sun protection. It will be whiter in winter because it is tightly covered. As long as there is no discomfort, there should be no problem.