Sinus Infections: When Do You Really Need Medication?

Blocked nose, facial pressure, and that nagging headache? You might have a sinus infection. But do you really need antibiotics — or can it clear up on its own?

Here’s how to spot the difference and what to do next.

What Causes Sinus Infections?

Sinus infections (sinusitis) happen when the sinus cavities become inflamed, often after a cold or allergy flare-up. The causes can be viral (most common), bacterial, fungal (rare), or allergy-related. In most cases, the inflammation is viral and self-limiting, improving within 7–10 days.

Viral vs Bacterial: Key Differences

Symptom Duration	Likely Cause	Action
Less than 10 days	Viral	Home remedies, rest
Lasting over 10 days	Bacterial	May need antibiotics
Worsening after initial improvement	Bacterial	Seek medical advice

Other signs of bacterial infection include thick green/yellow mucus, facial pain, and fever.

See our related post: The Best Ways to treat respiratory infections effectively.

Natural Remedies for Mild Sinus Infections

• Steam inhalation to loosen mucus
  • Saline nasal sprays or rinses
  • Paracetamol or ibuprofen for pain
  • Hydration to thin secretions
  • Rest
  • Avoid flying or diving if sinuses are blocked — pressure changes can make things worse.

When Antibiotics Are Needed

If symptoms persist beyond 10 days, worsen after a brief improvement, or include fever, your GP may prescribe antibiotics such as Doxycycline 100mg Capsules. This helps treat confirmed or suspected bacterial sinusitis.

Always complete the full course, even if symptoms improve early.

We also recommend reading: Why You Shouldn’t Ignore a Persistent Cough.

Long-Term Prevention Strategies

• Manage allergies (e.g., hay fever) to reduce inflammation
  • Use a humidifier in dry environments
  • Avoid cigarette smoke and pollutants
  • Keep sinuses clear during colds with gentle rinses
  • Address structural issues (e.g. nasal polyps) with a clinician

  For more information, check our guide on antibiotics for bacterial infection treatment.

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