The initial symptoms of a sinus infection are a green or yellow mucus discharge from your nose and severe facial pain around your cheeks, eyes or forehead.
Sinusitis usually occurs after an upper respiratory tract infection, such as a cold or the flu. It's often quite mild and clears up within 12 weeks.
You may also experience a high temperature and toothache if you have sinusitis.
A sinus infection that lasts longer than 12 weeks is known as chronic sinusitis.
Chronic sinusitis can occur as a result of a secondary bacterial infection or an underlying allergy. This can cause the membranes lining the nose and sinuses to become inflamed.
Common symptoms of chronic sinusitis include:
- a blocked nose
- a runny nose
- a sinus headache
- facial pain
- a reduced sense of smell
- bad breath (halitosis)
Children with sinusitis may be irritable, breathe through their mouth and have difficulty feeding. Their speech may sound nasal (like they have a stuffy cold) because their sinuses are blocked.
Take your child to see your GP if you notice these symptoms.