I recommend hialuronic acid,(the most secure and economic treatment avalilable) in good hands you are going to have beatiful lips.
To avoid the pain , I recommend the anesthesia like the one you have when you go to the dentistry, you are not going to feel any pain.
For any doubt or consultation you can write to firstname.lastname@example.org, or call (5411)40437371
Dr Gustavo Kovalovsky
Plastic and Reconstructive Surgeron -Mmember of the Buenos Aires Society of Plastic Surgery
ARG Plastic Surgery -Buenos Aires- Argentina