The following is my method, I hope it will help you:
1, eat less spicy food, any food needs to pass through the lips, so try to eat less spicy and irritating food, and eat some fruits, such as apples and bananas, every day.
2, insist on doing muscle exercises around the lips every day, it is best to match Ivan Lu, the effect will be better. It can not only prevent fine lines from appearing on the lips, but also make the lips firm, rich and three-dimensional. Massage for five minutes every day. After a long time, the lips will become thinner. You need to keep massaging every day.