No. After playing the clarinet for many years, some changes in the lips and oral tissues will occur, such as the formation of small protrusions or small teeth on the inner wall of the mouth. However, in most cases these changes do not affect normal life and performance. The correct playing posture and practice method are very important. Importantly, it can slow down the damage to the musician's oral cavity. Playing the clarinet will not directly cause mouth deformation, but you need to pay attention to the correct playing posture and method to avoid possible oral health problems.