If I have hyaluronic acid in my lips will reduce my gummy smile?

Thank you for your inquiry. It is difficult to provide an answer without seeing photos. Typically hyaluronic acid fillers can help reduce a gummy smile. There is no harm in consulting with a board certified plastic surgeon and trying a small amount of filler. The product isn't permanent so if you dont like your results there is no need to worry. Best of luck to you. 

Good Day. Many of my patients have the same concern.
Perioral beauty centers on the following:
1. straight, white teeth
2. Optimal dental show- this optimal appearance is 2/3 of the height of the maxillary central incisor tooth when smiling and 0-3 mm at rest.
3. minimal perioral wrinkles, especially of the upper lip area
4. Full upper and lower lips
How to achieve optimal dental show (not having gum show or a "gummy smile"):
a. volume replacement of the upper lip. This can be achieved with a HLA filler to the border and bulk of the lip, using a soft silastic implant, or using your own tissue, either fat, scar, tissue from a facelift (SMAS) or the tissue below your scalp (pericranium).
b. If the upper lip volume is optimized and the patient does not desire any more upper lip volume, then about 8 units of BOTOX (20 units of Disport) can relax the muscle of the upper lip (orbiculares oris) to hide additional tooth height.
Rarely is any other treatment required to treat the gummy smile or excess dental show.
Lip aesthetics use the following factors to determine lip size with an implant or fillers:
upper and lower lip size ratio
philtrum height-upper lip height proportions
degree of dental show
presence of upper lip wrinkles
patients desired lip size
The most influential factor in choosing the lip implant size was to optimize the lip size ratio of the upper and lower lip. One ratio was derived from the ancient Egyptian golden number (1.618) of facial aesthetics. Using this golden ratio, the upper lip height is a unit of 1 and the lower lip height a unit of 1.618 
In summary, upper lip volume replacement with a HLA filler or silastic implant will improve and may resolve excess dental show known as a "gummy smile". Additional improvement may be attained adding an injection of BOTOX or Disport to the muscle above the upper lip (pre maxilla).
I hope your final look is fabulous.