Final answer:
Antibiotics should not be given for sinusitis if symptoms persist for less than 7 days, if symptoms worsen after initial improvement if there is no facial pain, or if there is no runny nose.
Step-by-step explanation:
Antibiotics should not be given for sinusitis in the following situations:
- If symptoms persist for less than 7 days.
- If symptoms worsen after initial improvement.
- If there is no facial pain.
- If there is no runny nose.
These guidelines are based on the fact that viral rather than bacterial infections most commonly cause sinusitis, and antibiotics are ineffective against viruses. However, it's important to follow the advice of a healthcare professional for an accurate assessment and appropriate treatment.