Mouth taping is popular, but Dr. Michael Breus warns that taping your mouth shut at night can be risky if you have nasal congestion, breathing issues, or undiagnosed sleep apnea. In this episode of Night Shift, we break down why nasal breathing matters, why forcing your mouth closed is the wrong starting point, and why the real move is to improve airflow through your nose first. Saline rinses, nasal strips, internal nasal dilators, reducing inflammation, and getting a sleep study may matter more than tape.