Keep exercising, find some videos of weight loss on the Internet and dance for an hour every day. Dieting, eating more fruit without dinner, eating only fruit or yogurt at night can reduce weight and detoxify, and drinking a cup of honey water or light salt water on an empty stomach after getting up every morning can also detoxify. If it is dark, 17-year-old you should not use too nutritious skin care products. You can go to the drugstore to buy vitamin C, take a few tablets a day and make a whitening mask twice a week. You should buy a better mask, but it is not good if it is too cheap. Wear sunscreen when you go out. Stick to it like this.