1. Avoid prolonged exposure to the sun: ultraviolet rays in the sun can lead to skin blackening and inflammation, so it is important to avoid prolonged exposure to the sun.
2. Use sunscreen: Choose a suitable sunscreen and apply it regularly to protect your skin from ultraviolet rays.
3. Balanced diet: The diet contains enough nutrients, such as vitamin C, vitamin E and antioxidants, which helps to keep the skin healthy.
4. Clean the skin: Keep the skin clean and use cleansing products suitable for your skin.
5. Use whitening products: You can use skin care products containing whitening ingredients, such as whitening essence and whitening mask.
6. Regular exfoliation: Regular exfoliation of aged cutin on the skin surface helps to promote skin metabolism and reduce pigmentation.
It should be noted that different skin types and problems require different methods, so it is best to consult a doctor or a professional skin care professional before doing any whitening.