Sinus symptoms are commonly caused by viral infections, inflammation, or allergies, and antibiotics do not treat viruses. Deciding whether antibiotics are appropriate requires looking at how long symptoms have lasted, how severe they are, whether they are improving, and the person’s medical risks—not just the colour of nasal mucus.
Clues that guide the decision
Many uncomplicated episodes improve with supportive care. Clinicians consider persistence without improvement, severe symptoms, deterioration after an initial improvement, complications, and conditions that increase risk. The exact criteria and recommended treatment can vary by guideline and local resistance patterns.
Benefits and downsides
When bacterial infection is likely and treatment is indicated, antibiotics may help. They can also cause side effects and contribute to antibiotic resistance when used unnecessarily. Some people may be offered a delayed prescription with clear instructions, while others need prompt treatment or further assessment.
Safe symptom management
Use symptom-relief measures appropriate to your health and follow dosing instructions. Avoid using leftover antibiotics, sharing medicines, or stopping a prescribed course without advice. Seek urgent care if symptoms suggest a complication, such as eye swelling, visual changes, severe headache, confusion, or neurological symptoms.
Frequently asked questions
Is thick yellow mucus proof of bacteria? No. Mucus may change colour during viral inflammation as well.
Can antibiotics make symptoms disappear immediately? No. Improvement is not immediate, and the choice of medicine should be reviewed if symptoms worsen or do not improve as advised.
Are antibiotics safe for everyone? They can cause allergies, interactions, and other adverse effects; the clinician should consider individual risks and other medicines.
Explore our nasal breathing assessment and nasal endoscopy pages for more information about related care options. A clinician can advise whether either is appropriate based on the individual history and examination findings.
Related reading
- Acute Sinusitis: How Long Does It Usually Last?
- Chronic Sinusitis: Symptoms, Causes and Treatment Options