What can I do to show more upper teeth when I smile? (photo)

Thank you for your question. I suggest that you consult with your board certified facial plastic surgeon because you may benefit from fillers. 
Best wishes,

 It looks like your upper lip may be a little tense and that could be why so little of your teeth is revealed during a smile. If that’s the case,  Botox, Dysport, or Xeomin could relax the muscles that pull your lip downward, letting it rise a little more during a smile. Consulting with a board-certified dermatologist will allow your smile to be evaluated in person, and the proper recommendations made.

 It’s possible that Botox or another neurmomodulator, such as Xeomin or Dysport, could relax your upper lip enough so that it would pull up farther when smiling. Whether this is the best treatment for you can only be determined by a face-to-face consultation with a board-certified dermatologist. You need to find an expert so as not to interfere with the lips’ function.