What can be done about a top lip that's smaller than the bottom one? (Photo)

There are many excellent hyaluronic acid fillers on the market that allow tailoring of the lips to your preferred appearance.  Rebalancing the upper and lower lip proportions is frequently a part of this.  Find an expert injector in your area and begin with a consultation.

There are a number of options for improving the volume of an upper lip. By far, the most common method is with filler injections, usually with one of the hyaluronic acid gel alternatives. There are other options also including fat injections and even implants. A good consultation with a reputable plastic surgeon will help you decide the various alternatives and what may work best with you and whether it can achieve the result you are trying for.

You are the perfect candidate for augmentation of your upper  lip using hyaluronic acid fillers.  The professor theater is a very simple one. You first put anesthetic cream that numbs the lip a little bit. Then you may use anyone of the following fillers.  VolBella,Juvederm,Restylane,and Voluma. While there are many others these are the predominant ones that are being used for your issue.

Dear iwantmesome,based on your photo, you look like a great candidate for a lip augmentation. I typically use Juvederm for my lip sculpting. There are two main focuses of lip injections, adding volume and actually sculpting the shape. Both involve injecting the filler in different areas of the lips and patterns.
I would recommend finding a plastic surgeon to perform you lip injections. Most of my patients have results that last at least 6 months if done correctly.Daniel Barrett, MD, MHA, MS 
Certified, American Board of Plastic Surgery  
Member, Am. Society of Plastic Surgery

Thank you for your photo. You appear to be a great candidate to accentuate and reshape your lips with hyaluronic acid fillers such as Restylane silk or Juvederm Ultra XC - particularly on the top to improve the proportions between the upper and lower lips. An experienced injector should be able to help taillor the injection to the exact style of lip you prefer from large and pouty to soft and subtle.  For the best treatment options, it is important to visit an expert for an in-person examination. Hope this helps!
Johnson C. Lee MD Plastic Surgery@drjohnsonlee