My mouth looks fine when it is at rest. However, when I smile or talk, it looks like I have facial palsy. One side doesn't move while the other side does. All joking aside, I talk out of one side of my mouth only. I am very self-conscious about it. I have watched myself when I have skyped with people and I hate what I see. I didn't always have this problem. It seems like it gets progressively worse over time. Is this a dental or maxillofacial? What might be done to correct it.