What causes a small white spot on the lower eyelid?
Small white bumps on the lower eyelid are commonly caused by one of several benign, non-contagious conditions. The most frequent cause is a milia—a tiny, keratin-filled cyst that forms when dead skin cells become trapped beneath the surface of the skin. Milia appear as firm, pearly-white or yellowish 1–2 mm papules and are especially common around the eyes due to the thinness of the periorbital skin.
Another possibility is a meibomian gland cyst (also called a chalazion), which arises from blockage and inflammation of a meibomian gland in the tarsal plate. While chalazia often present as painless, firm, round nodules—sometimes with subtle overlying skin discoloration—they may initially appear whitish if the blocked gland material is close to the surface. Unlike hordeola (styes), chalazia are typically non-infectious and not tender unless secondarily inflamed.
A less common but important consideration is an inclusion cyst or epidermal cyst, particularly if the lesion has been present for months or slowly enlarged. These are lined by epithelium and filled with laminated keratin; they may have a central punctum and can occur anywhere on the eyelid margin or skin.
Rarely, persistent or atypical white lesions warrant evaluation for other diagnoses—including sebaceous hyperplasia, molluscum contagiosum (though more typical in children and immunocompromised individuals), or, very rarely, early basal cell carcinoma (which usually presents with telangiectasias, ulceration, or pearly borders rather than a simple white spot). Any lesion that grows rapidly, bleeds, ulcerates, or fails to resolve within 6–8 weeks should be assessed by an ophthalmologist or dermatologist for clinical evaluation and, if indicated, biopsy.
In most cases, small asymptomatic white spots require no treatment and may resolve spontaneously. Gentle cleansing and avoidance of harsh exfoliants or squeezing is advised. If cosmetically bothersome or persistent, options include professional extraction (e.g., sterile lancing and expression for milia) or intralesional corticosteroid injection for chalazia. Never attempt self-enucleation—this risks infection, scarring, or injury to the delicate ocular adnexa.