My mouth is very small not like thin lips but my mouth is small and I need to find out how to fix that?

Facial aesthetics requires attention to detail and a firm understanding of facial balance and proportions.  Often times very subtle alterations can have a profound impact on the perceived aesthetic balance.  Your particular concerns might be addressed in a number of ways, but without photos to comment on I cannot give specific advice.  Best Regards

Hello and thank you for reaching out. To determine if you would be a candidate for fillers in the lip or oral area, would require photos or even better, a physical exam. To enhance the size of your lips, and define corners and edges, filler is a great product to use. Please consult a board certified plastic surgeon, or a certified nurse practitioner injector to see what they may recommend. Best Wishes. 

Hello, and thanks for your question. Without a photo, it's difficult to recommend a specific treatment plan. However, you may benefit from fillers. To maximize the likelihood of a favorable outcome, I recommend that you only get treated by a well-trained and experienced dermatologist or plastic surgeon. Hope this opinion is helpful to you. Best of luck, Dr. Frucht.