Cause of a white bump on the sclera

Vision is extremely important; however, many people notice in daily life that their vision gradually declines due to insufficient attention to eye protection. Additionally, some individuals frequently observe abnormalities in their eyes—for instance, noticing a small white bump appearing on the white part of the eye (sclera). What causes such a white nodule on the sclera? Below, we address this question.

What Causes a White Nodule on the Sclera?

A white nodule on the sclera is most commonly indicative of a pinguecula. A pinguecula is a physiological finding characterized by a horizontal, triangular, or oval-shaped, slightly elevated, whitish or yellowish nodule on the bulbar conjunctiva at the limbus within the palpebral fissure (i.e., the area exposed between the eyelids). This condition typically does not affect vision or cause symptoms and therefore usually requires no treatment. However, if inflammation develops—termed pingueculitis—low-concentration topical corticosteroids or nonsteroidal anti-inflammatory drugs (NSAIDs) may be prescribed to control local inflammation. In cases where the pinguecula severely affects appearance or recurs repeatedly, surgical excision may be considered. During its progression, close monitoring is essential; if it transforms into pterygium, early surgical intervention is recommended.

Knowledge Extension: What Should You Do If a White Nodule Appears on the Sclera?

When a white nodule appears on the sclera, its exact nature must be determined. It may represent a simple lymphoid follicle—a benign finding potentially resulting from impaired lymphatic drainage. Such follicles are typically asymptomatic, causing neither pain nor foreign-body sensation. If cosmetic concerns arise, removal or incision under topical anesthesia may be considered.

Alternatively, the lesion could be a limbal dermoid—a congenital benign tumor located at the corneoscleral limbus. Surgical excision is the primary treatment for limbal dermoids. In cases where the lesion extensively infiltrates the cornea, visual impairment may occur. For young children, surgery generally requires general anesthesia, which carries certain risks. Therefore, appropriate diagnostic evaluation is essential to determine promptly whether treatment is necessary and, if so, which therapeutic approach is optimal.

The above outlines the common causes of a white nodule on the sclera. We hope this information is helpful to you.