Botox will not change your lip size however filler will definitely change the lip size and shape.
Filler treatment to the lips requires an artistic eye and knowledge of the beautiful ideal and anatomy to avoid complications, asymmetry, unnatural results, or bad issues such as intravascular injection.
Be sure to communicate exactly what you are desiring as it may be quite different from what the injector thinks your lips should look like.
I personally try to achieve classical proportions where the upper lip is slighty more than half the size of the lower lip. Many augmented lips have the upper and lower lip being almost equal in size which to my eye looks unatureal but nontheless is frequently requested.
For adding volume to the lips, fillers would be the appropriate treatment. I like to use Juvederm XC or Juvederm Volbella when adding volume to the lips, and when correcting unevenness.
My advice is to seek out an experienced injector to ensure the best result. (P. Alexander Ataii, MD, San Diego Physician)
Filler will help you to achieve the results that you are looking for. Botox is a neuromodulator that will help to decrease muscle movement and better used to treat wrinkles! (Calvin Jung, MD, Houston Physician)
Filler is the appropriate choice of treatment to add a little bit more volume to the lips. Make sure you follow with a highly trained provider like a board certified dermatologist or plastic surgeon if you decide to get the procedure performed. (Kenne Ogunmakin, MD, Katy Dermatologic Surgeon)
Botox is a product that eases the appearance of lines that are caused from muscle activity. Fillers add volume to desired areas. To achieve the look you desire fillers would be the appropriate product. There are several that are available on the market.
Visit with an experienced injector in your area to decide which is best for you. (Camille Cash, MD, Houston Plastic Surgeon)
Change in lip size
Botox will not affect this at all, but filler will help, there are many available and check with your board certified dermatologist or plastic surgeon. (Melvin Elson, MD, Nashville Dermatologist)
Filler injection in the lips give immediate results!
Typically one lip should be slightly larger than the other and, which one (upper or lower) depends on your aesthetic ideals and cultural background. (Jeremy B. White, MD, Miami Plastic Surgeon)
Fillers For Upper Lip
Botox is not used for the upper lip. You would benefit from a small amount of Restylane into the lips to help make your lips more even and beautiful. (Michele S. Green, MD, New York Dermatologist)
Filler for Lips
Filler will give your lips volume. Botox will not. If you are looking to enhance your already beautiful lips, you should consider a filler performed by a reputable Dr. (David Shahram Mashhadian, MD, Beverly Hills Oral & Maxillofacial Surgeon)
Juvederm, Restylane or Belotero fillers for lip enhancement
Your concern is uneven volume of your lips so you require lip enhancement to make your lips more symmetrical. Fillers such as Juvederm, Restylane or Belotero would be a good choice. (Martie Gidon, MD, FRCPC, Toronto Dermatologist)
Botox or filler
there is often a lot of confusion between the two. Botox relaxes your muscles. Although it can be used (sparingly) around the mouth, Botox will not correct this problem. There are nice fillers that are specially designed for the lips that can be used.
Lips can be a difficult area to treat nicely so make sure that you seek someone with experience. (Rick Balharry, MD, Calgary Physician)
There are a variety of fillers that can safely be used to add volume to the lips – Volbella and Restylane Silk are excellent for adding subtle volume, while products like Juvederm and Restylane can are great for a more pronounced pout.
All these products are made from hyaluronic acid – a substance our bodies naturally produce to help maintain hydration in the skin. While Botox can be used around the lips as well, it will not help even out your lip volume.
I would recommend that you schedule a consultation with an experienced cosmetic dermatologist or plastic surgeon to discuss the best treatment options for you. (Faiyaaz Kalimullah, MD, FAAD, Chicago Dermatologic Surgeon)