Hordeolum Hordeolum internum 2009-10-27T11:33:25Z Hordeola interna are acute purulent infections affecting the meibomian sebacious glands, often caused by staphylococcus infections. In contrast to chalazia (chronic epithelioid cell granulomatous inflammation of the meibomian gland caused by inflammation of a blocked meibomian gland), hordeola are extremely painfull and can cause extreme local swelling. UMLS:C4280375 Stye of inner eyelid HP:0010608 UMLS:C0085690 SNOMEDCT_US:414521009 Red bump on inner eyelid