Distinguishing Preseptal Cellulitis from Stye (Hordeolum)

Key Clinical Distinctions

Preseptal cellulitis involves diffuse swelling and erythema affecting the entire eyelid and surrounding periorbital tissues, with warmth and tenderness extending across a broad area 1
The American College of Emergency Physicians notes that preseptal cellulitis demonstrates diffuse periorbital erythema and edema without clear borders, warmth across the affected eyelid and periorbital tissues, and tenderness throughout the swollen area 1
The American Academy of Ophthalmology guidelines state that preseptal cellulitis is distinguished from orbital cellulitis by the absence of proptosis, normal extraocular movements, and preserved vision 1, 2
The World Journal of Emergency Surgery recommends that stye (hordeolum) management involves incision and drainage as the primary treatment for simple abscesses like styes, with antibiotics not needed for simple styes where induration and erythema are limited to the defined area of the abscess 3, 4

The American College of Emergency Physicians recommends outpatient treatment with high-dose oral amoxicillin-clavulanate for mild preseptal cellulitis cases without systemic signs, with mandatory reassessment within 24-48 hours 2
Hospitalization is required for preseptal cellulitis if the eyelid is more than 50% closed, systemic signs are present, or there is an inability to adequately examine the eye 2
Broad-spectrum antibiotics targeting Gram-positive pathogens, such as IV amoxicillin-clavulanate, cefazolin, or ceftriaxone, are recommended for severe preseptal cellulitis cases 2
The World Journal of Emergency Surgery guidelines state that incision and drainage is the primary treatment for styes, with antibiotics not needed for simple cases 3, 4

The American College of Emergency Physicians warns that assuming all periorbital infections are preseptal cellulitis can delay diagnosis of orbital cellulitis, which requires urgent intervention 1
Assessing for proptosis, impaired extraocular movements, decreased visual acuity, or ophthalmoplegia is crucial, as any of these indicate orbital involvement requiring immediate imaging 1, 2
The American Academy of Ophthalmology guidelines recommend that preseptal cellulitis cases be diagnosed clinically without imaging, but CT orbits with IV contrast should be obtained if clinical findings cannot reliably distinguish from orbital cellulitis, if there are signs of orbital involvement, or if no improvement after 24-48 hours of antibiotics 1, 2, 5
The World Journal of Emergency Surgery recommends against prescribing antibiotics for simple styes, as this represents unnecessary antibiotic exposure when drainage alone is curative 3, 4