External application can be added after oral administration. I suggest you use Avon whitening series. You can buy a small suit, which is cost-effective and cheap for your own use. Then buy a wc powder to use with the emulsion, and the effect is estimated to come out in half a month. You can also add my friends to discuss my skin care experience. I hope my method is useful to you.
For Li Wei, I'm using these now, and the effect is good. By the way, you should pay attention to your endocrine system. Acne is the cause of endocrine.