I had a similar experience with irregular teeth. 18 years old had orthodontics, and his teeth were neat, but he felt that his mouth was still protruding sideways and his nose was not too retracted. I'm drunk when I think about it! Later, how to correct all kinds of searches, unexpectedly found that mouth breathing will become ugly! I feel that I finally found the reason! ~! Half a year ago, I bought an mouthopener (the kind that is worn on my face like a mask, but there are only a few fixed ropes in front) and something for lip muscle training. This is the best decision I have ever made. Because, now I wake up with my mouth closed, and I am used to not opening my mouth during the day. As for facial improvement: first of all, I don't think my lips are upturned. My mother said that my cheekbones feel low (they used to be higher), but I actually feel that my nose has become stiff. Colleagues also said that they felt that their faces were different, but they couldn't tell what was different (I don't know if it was an expression). I think it's amazing, so I searched the changes after breath correction today, but I didn't see much information, so I didn't know much about my changes.