To tell the truth, there is really no good way except makeup and surgery. But of the two, I think the makeup method will be better. After all, there is no risk compared with surgery.

For makeup with thick lips, liquid foundation should be applied around the lips first, but the outline of the lips is not so obvious. Moreover, it is more common to avoid using high-gloss near the mouth, such as using high-gloss powder in the center of the lips and the upper jaw. Don't shy away! The use of highlights will make lips look more upturned and thicker. Also pay attention to the use of lipstick, try to avoid particularly bright colors such as red and purple, and choose conservative colors that are not too "eye-catching". Coffee and brown are both good choices. Don't choose the kind of lip gloss that is particularly shiny, and use as little as possible. Those with pearls can avoid it. In short, the principle is to try to make your lips less prominent. You can choose to highlight your eyes, and your lips are integrated with your full face makeup. This will make your lips look thinner and distract others.

I hope these things can help you.