1. Is it necessary to apply sunscreen: It is not necessary to apply sunscreen before applying sunscreen. This depends on the individual's skin condition, needs, and preferences.
2. The function of isolation cream: Isolation cream is mainly used to form a protective film between the skin and makeup, which can isolate pollutants, dust, makeup and other harmful substances in the air from the skin. At the same time, some isolation creams also have the functions of moisturizing, sun protection or adjusting skin tone.
3. The choice of sunscreen and isolation cream: If your sunscreen already has sufficient SPF (sun protection factor) and PA (sun blocking ability), and your skin does not require additional moisturizing or isolation functions, then you can directly use sunscreen. If you want to have the effect of sunscreen and retouching, adjusting skin color or slightly concealer at the same time, you can choose an isolation cream with these functions, and then apply sunscreen later, or choose an isolation cream that combines sunscreen functions. Note that if both are used, ensure that sunscreen is the last step to ensure its sun protection effect is not affected by other products.