Will tea tree oil stop the bad breath coming from my sinuses? used in a nasal rinse bottle to clean out my nasal passages.

Probably not.: Although multiple poorly designed studies have suggested an antibacterial effect for tea tree oil, there have been no large randomized studies of its use, especially in the nasal passages. And although most people do not have reactions, there have been reports of deaths due to TTO ingestion in rats and reports of oral poisoning in children and adults. Be careful of what you read on the Internet.

Infection: Bad breath from sulfur producing bacteria. Sinuses probably infected. Oil, of any sort, is not the same thing as an antibiotic. You don't want to mess with this, infections can spread. See an ENT Specialist.

Unlikely: In the majority of cases, the cause of bad breath or halitosis, poor dental hygiene or may be a sign of other serious health problems (chronic sinus). See your dentist for Halimeter test and bad breath treatment that depends on its cause