Orbital Cellulitis


Orbital cellulitis is a serious infection of the bony cavity in which the eyeball sits and the muscles and soft tissues that surround the eyeball. This cavity is called the orbit. It is surrounded by the sinuses. The sinuses are the hollow areas of the skull around the nose. Orbital cellulitis affects not only the eye, but also the eyelids, eyebrows, and cheeks.

If the infection is not treated, it can lead to blindness and nerve damage of the face.

Eyeball in Orbit
Eye bone socket nerve
The cavity below the eye is a sinus, the most common place for the infection to start.
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Orbital cellulitis is caused by certain bacteria.

Risk Factors

This condition is more common in children. Factors that increase the risk of getting orbital cellulitis include:

  • Infections that spread from areas surrounding the eye, such as the eyelids, sinuses, mouth and teeth, and face
  • Infections that spread from the bloodstream
  • Injury or surgery in the area
  • Stye on the eyelid
  • Bug bite or sting to the eyelid


Symptoms of orbital cellulitis include:

  • Bulging eye
  • Painful eye movements
  • Tender or warm tissues around the eye
  • Swollen eyelids
  • Difficulty seeing when the eyelid is swollen
  • Fever
  • Headache
  • Runny nose
  • Double vision
  • Blurry vision


Orbital cellulitis can often be diagnosed by examining the eyes, teeth, and mouth. Your medical and family history will be taken.

Your bodily fluids may be tested. This can be done with:

  • Blood tests
  • Testing samples from the lining of your eye, nose, and throat

Images may be taken of your bodily structures. This can be done with:


Orbital cellulitis can worsen quickly. It usually requires hospitalization.


Medication used to treat orbital cellulitis include:

  • Antibiotics to treat the infection
  • Diuretics or eye drops to help decrease pressure within the eyeball
  • Oral corticosteroids to reduce inflammation, swelling, and pain


In some cases, surgery may be done to drain a pus collection from an infected sinus or orbit.


Treating sinus or dental infections right away may prevent them from spreading to the eyes. In addition, children should be protected with the Hib B vaccine, which will prevent most of the Haemophilus influenzae type B infections.


Please note, not all procedures included in this resource library are available at Allegiance Health or performed by Allegiance Health physicians.

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