One case of big lips is that the lips are thicker, and the other case is that the mouth is bigger and the mouth shape is bigger. These two situations are different, and the treatment and improvement methods are different.

If only the lips are thick, the shape of the lips can be thinned by lip thinning surgery, and the normal shape can be used. Moreover, this kind of operation rarely leaves scars, and the basic symmetry of both sides recovers faster after completion. Another situation is that the lips are bigger and the mouth is bigger. This is not a simple problem of lip hypertrophy, and the mouth is bigger. From a medical point of view, there is a deformity called megacephaly, which may be related to development. You should see a doctor for a diagnosis. If your mouth is big, you can have an operation to make it smaller. The operation is relatively complicated and may leave local scars, because the design of squab is very difficult. To be a normal artificial squab, the squab design should be more detailed and make the traces smaller. Lip size is a very unprofessional and vague concept, which needs to be analyzed in detail.