Hyperactive mentalis muscle.How many Botox treatments will I do a year for treatment of its appearance?Is surgery a safe option?

This treatment is usually needed 3-4 times a year.  However, you are asking more specific questions that really need a photograph or video to assess, also I suggest a formal consultation with a botox and filler expert.  Best, Dr. Emer.

Thank you for your questions.  As far as Botox therapy, treatment of mentalis muscle hyperactivity would likely require treatment 3-4 times a year.  Botox effects can last anywhere from 3-4 months per treatment session, and yes with recurrent treatments, it will lead to mild atrophy of the muscle, and some prolongation of Botox's effects.  Botox effects are never permanent, however, so if you elected to stop, your mentalis muscle would hypertrophy back to its original size.  I would be cautious of any surgery to the mentalis muscle, as permanent injury or removal can cause issues with your lip shape, balance, as well as issues with your chin soft tissues.  

An overactive mentalis muscle may be part of your genetic makeup which is accentuated by age or may be caused by jaw / teeth malocclusion. Having Botox will certainly help, used in very small doses between 2 and 3 times a year. Best to let it completely ware off before re-injection. Also ask an orthodontist to look at your mouth and teeth bite in order to make sure there is no underlying orthodontic contribution.