Cause of adenoids is swollen tonsil by either bacterial or virus infection through mouth breathing.

Why does Lip Trainer Patakara stop swollen tonsil and its inflammation?

Because people can change from mouth breather into nose breather (= stay closing mouth<=lips>) without thinking, after lip-training for approximately 2 weeks based on 4 times per day of lip-training, 3 minutes each session, and saliva is not evaporated by taking breathe through nose. As a result, saliva is maintained in oral and throat for 24 hours.

Eventually, saliva that has strong power to wash up bacterial or virus infection fulfills essential role and then, swollen tonsil is gone as the photo here.