- A sinus rinse does not technically worsen sinus issues by itself, but improper use or overuse of sinus rinses can lead to worsening of the existing infection or an increased vulnerability to infections, respectively.
- Sterile water should be used since tap water can cause harmful microorganisms to enter the sinuses and cause infections.
- The device used should be thoroughly cleaned immediately after use to prevent the growth of microorganisms.
- Some people may experience mild nasal irritation with the use of nasal rinses.