Acute sinusitis is inflammation of the lining of the nose and sinuses, often after a viral respiratory infection. It can cause blocked nose, facial pressure, reduced smell, and thick nasal mucus. Many cases improve gradually without antibiotics, but the duration, severity, and pattern of symptoms help determine when medical review is needed.
Typical symptom timeline
Symptoms often peak during the first several days and then gradually improve, though congestion or cough may linger. A bacterial cause becomes more likely with certain patterns, such as symptoms lasting longer without improvement, marked symptoms that worsen after initial recovery, or severe illness. Colour of mucus alone does not establish a bacterial infection.
What may help at home
Rest, fluids, and suitable pain relief may ease discomfort. Saline spray or rinsing may help some people; use sterile, distilled, or previously boiled and cooled water for nasal irrigation. Ask a pharmacist or clinician before using decongestants or other medicines if you have chronic conditions, are pregnant, or take regular medication.
When to seek care
Arrange assessment if symptoms persist beyond the expected period, repeatedly return, are severe, or worsen after improving. Seek urgent care for swelling around an eye, vision changes, severe headache, confusion, neck stiffness, or a very unwell appearance because uncommon complications need prompt treatment.
Frequently asked questions
Does green mucus mean antibiotics are needed? No. Mucus colour alone cannot reliably distinguish viral from bacterial sinusitis.
Can sinusitis last for weeks? Some symptoms may linger, but persistent or worsening symptoms should be assessed to confirm the cause and plan care.
When is it urgent? Eye swelling, vision changes, confusion, neck stiffness, or severe headache require urgent assessment.
Explore our chronic rhinosinusitis assessment page for more information about this care option. A clinician can advise based on the individual history and examination findings.
Related reading
- Chronic Sinusitis: Symptoms, Causes and Treatment Options
- Sinus Headache or Migraine? Understanding the Difference