In fact, the best way is to exercise and be targeted: 1. Every day after dinner, raise your arms as high as possible, hold your hands tightly, and make your arms feel tight. Keep doing this for ten minutes! 2. Put your arms flat, first move to both sides, and then move up and down for five minutes! Keep doing it. Exercise 15 minutes every day for one month, which will definitely have a significant effect. This is my experience! Now teach you, you can try!