Sinusitis

Also called Sinus infection or Rhinosinusitis

Sinusitis is swelling of the sinuses, the small air-filled spaces behind the cheekbones and forehead. It is usually caused by a viral infection, such as a cold, and often gets better by itself. Sometimes it lasts 12 weeks or more (chronic sinusitis), which can be linked to allergies, nasal polyps or other causes.

Last updated Nov 9, 2026

What it is

Rest, fluids, painkillers and rinsing the nose with salt water help. Antibiotics are only needed if it is likely to be caused by bacteria.

Long-term sinusitis may be treated with steroid nasal sprays and, sometimes, surgery.

Common signs

  • Pain, swelling and tenderness around the cheeks, eyes or forehead
  • A blocked nose
  • Reduced sense of smell
  • Green or yellow mucus from the nose
  • A high temperature
  • Toothache or bad breath

How it is usually diagnosed

  • Questions about symptoms and an examination
  • Sometimes a camera test of the nose or a CT scan if it keeps coming back

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • GP or ENT notes
  • CT reports
  • Prescriptions

Questions to ask your doctor

  • Do I need antibiotics?
  • How should I use a nasal spray or rinse?
  • Should I be referred to a specialist?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Swelling or redness around the eyes, changes in vision, a severe headache, confusion or a stiff neck: call 112

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

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