I had maxillio facial surgery in 1997 while living in Beverly Hills, CA as I had an under bite. Surgery went well but my lower lip is still partially numb and my chin is mostly numb. I now live in Canada and in 2012, I was attacked and hit on the left side of my face. I received a concussion and bruising. In the past 9 months, I have experienced drooping on the left side of my mouth - 2 occasions - last July and now in April. It was thought I was having a mini stroke but all tests were normal. Do you thinks the drooping is due to the trauma I received in 2012? What can be done about this?