Periorbital cellulitis is a medical term referring to an infection of the eyelid or skin surrounding the eye, according to MedlinePlus. Typically, periorbital cellulitis is not painful and does not affect vision.
Most commonly affecting children under 18 months of age, periorbital cellulitis can be caused by an injury near the eye that breaks the skin, such as a scratch or bug bite, according to MedlinePlus. Symptoms include eye redness and swelling. Medical attention should be sought for eye redness and swelling that worsens after treatment, development of fever, difficulty or pain with eye movements, a bulging out appearance of the eye or vision changes. A doctor may prescribe antibiotics to treat these symptoms.