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What Is Periorbital Cellulitis?

Periorbital cellulitis, also called preseptal cellulitis, is an infection of the eyelid and surrounding soft tissues located in front of the orbital septum. It typically causes redness, warmth, swelling, and tenderness of the lids without involving the deeper orbital contents. Vision, ocular motility, and the globe itself remain normal in uncomplicated cases. The infection often follows local trauma, insect bites, skin lesions, or spread from nearby sinus or nasal infections. Prompt treatment is needed to prevent extension into the orbit, where cellulitis can become a serious emergency.

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What Is Periorbital Cellulitis?

Periorbital cellulitis, also called preseptal cellulitis, is an infection of the eyelid and surrounding soft tissues located in front of the orbital septum. It typically causes redness, warmth, swelling, and tenderness of the lids without involving the deeper orbital contents. Vision, ocular motility, and the globe itself remain normal in uncomplicated cases. The infection often follows local trauma, insect bites, skin lesions, or spread from nearby sinus or nasal infections. Prompt treatment is needed to prevent extension into the orbit, where cellulitis can become a serious emergency.

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Signs, Symptoms, and Typical Course

Patients present with unilateral eyelid swelling, redness, and discomfort, and sometimes low grade fever. The eye opens less because of lid edema, but when the lids are gently separated the globe appears white and quiet. Eye movements stay full and painless, and vision is usually unaffected. Children are more commonly affected than adults. With appropriate antibiotic therapy, swelling and pain often improve within a few days.

Causes and Risk Factors

Periorbital cellulitis commonly develops after minor skin trauma around the eye, hordeolum or chalazion, insect bites, or superficial skin infections. Spread from sinusitis, especially ethmoid sinusitis, can also seed the periorbital tissues. The most frequent pathogens are gram positive bacteria such as Staphylococcus and Streptococcus species, including strains that produce beta lactamase. Incomplete vaccination or immunocompromise can alter the spectrum of organisms and severity. Early recognition in children is especially important because sinus disease is a frequent source.

Diagnosis and Distinguishing From Orbital Cellulitis

Diagnosis is based on clinical examination that confirms normal vision, normal pupil responses, and full, painless extraocular movements. Lack of proptosis and absence of pain with eye movement help separate periorbital from orbital cellulitis. When findings are atypical, or when systemic symptoms are marked, imaging with CT or MRI of the orbits and sinuses is performed to rule out deeper infection. Blood tests and cultures are considered in ill patients or those who need hospital care.

Treatment and Prognosis

Mild periorbital cellulitis in otherwise healthy patients is often treated with oral antibiotics that cover common skin and sinus organisms, along with close follow up. Children, patients with systemic illness, or those with uncertain diagnosis may need hospitalization and intravenous antibiotics. Warm compresses can add comfort, but pressure on the lids should be gentle. Most cases resolve without sequelae when treated promptly. Progression to orbital cellulitis, abscess, or cavernous sinus thrombosis is uncommon but serious, so worsening symptoms require urgent reassessment.

FAQs About Periorbital Cellulitis

Is periorbital cellulitis the same as orbital cellulitis?

No, periorbital cellulitis is limited to tissues in front of the septum, while orbital cellulitis involves deeper orbital structures and carries higher risk.

Can I manage periorbital cellulitis at home?

Mild cases in stable patients can be treated as an outpatient with oral antibiotics, but careful monitoring for worsening signs is essential.

What signs suggest that infection is spreading into the orbit?

New double vision, pain with eye movement, proptosis, or vision change raise concern for orbital involvement and need urgent care.

Will periorbital cellulitis damage my vision?

Vision usually stays normal if the infection remains preseptal and is treated quickly, but delayed care increases risk of deeper spread.

References

EyeWiki. ?Preseptal Cellulitis.? https://eyewiki.org/Preseptal_Cellulitis

NCBI Bookshelf (StatPearls). ?Periorbital Cellulitis.? https://www.ncbi.nlm.nih.gov/books/NBK470408/

Cleveland Clinic. ?Periorbital (Preseptal) Cellulitis.? https://my.clevelandclinic.org/health/diseases/23566-periorbital-cellulitis

MSD Manual Professional Version. ?Preseptal and Orbital Cellulitis.? https://www.msdmanuals.com/professional/eye-disorders/orbital-diseases/preseptal-and-orbital-cellulitis

American Academy of Ophthalmology (AAO). ?What Is Cellulitis?? https://www.aao.org/eye-health/diseases/what-is-cellulitis