Eyelid lumps: stye vs chalazion vs BCC

Differentiate eyelid lumps: a stye (hordeolum) is acute, painful, at the lid margin; a chalazion is a chronic, less-tender Meibomian granuloma sitting back in the tarsal plate; a slow-growing pearly nodule with telangiectasia, especially lower lid, is BCC; any pigmented lesion needs referral to exclude melanoma.