My chin flattens and points downwards when I smile, goes dimply, makes me look like I have a double chin? (Photos)

Eter an in person consolation I would recommend Botox injections for wrinkling of the chin due to mentalist action. As for under can either minor lipo surgery or 2 KyBella sessions.. 

It is possible that botox might be helpful in weakening the muscle.  A consult with a surgeon may be helpful.

 Hi, I have performed many facial shaping procedures, including Chin Augmentation with dermal fillers or silastic chin implants, for over 30 years.  From the photos and history, this sounds like an over-active Mentalis muscle.  You might want to try Botox injections to weaken the strength of the Mentalis muscle to see if this effect will be diminished.Hope this helps.