After using Listerine which contained peroxide for several weeks I experienced burning sensation in my lower gum and lip. There was nothing to see, however except some swelling of the gum. The swelling has gone down now, many weeks later, but since then I have experienced either a very dry mouth OR increased drooling from corners of the mouth especially when eating but sometimes even when just talking
Hi, This can be due to the fact that using a concentrated solution of mouthwash can cause inflammation inside mouth leading to excessive salivation. It can cause Chat Doctor.  So, my suggestion is to consult an oral physician and get evaluated. If there is inflammation inside mouth better such ice pops and do warm saline gargles. Take soft meals and avoid spicy foods and