Excessive Gingival Display (medico speak for a gummy smile) could be one reason; and this is when your smile shows too much gum tissue above the top teeth. If you are concerned or self-conscious about having a gummy smile; the good news is it is entirely treatable.
A gummy smile occurs when the ‘smile muscle’ elevates strongly above the teeth line, showing too much gum line. The good news for those who are concerned or self-conscious about having a gummy smile, there is a fast acting and safe cosmetic procedure which has been widely used since the 1970’s.
Treatment involves injecting an anti-wrinkle solution between the upper lip and nose. With this treatment, the overactive upper lip muscle contracts, allowing the top lip to relax lower over your gums; bringing about a natural attractive smile.