Will Botox improve my smile and decrease the nose flaring? (Photo)

the short answer is that you are not going to get any significant positive benefit from botox for your smile or nose.  Even with smile you have a slightly low hanging lip.  On your lateral view your nasal tip doesn't pull down.  If you try and botox for flaring, you will drop your lip even lower and your lip will hood over your teeth.  Lip eversion with botox is difficult to perform with long lips.  Sorry if that's too short of an answer.  on a medical mission this week in vietnam. 

I have used Botox and performed Rhinoplasty for almost 30 years.  There is  a slight effect that you would get from a Botox injection that could diminish the amount that the nasal muscle pulls your tip down but will do very little for the flared nostrils.  In the end, based upon the attached photos, a Rhinoplasty would be required to thin and refine your nose.  Hope this helps.

Botox can help to reduce the tilting of the nose downward with smiling but it may also make the upper central lip not move as well.  Also, Botox can help reduce nasal flaring but is not often done because it also causes nasal congestion.  It will do nothing to reduce the width of your nose.  Your best choice is a rhinoplasty.  The muscle than causes your nose to dip can be removed and the width can be improved significantly.  Best wishes.