Hardoleum internum is -
Suppurative inflammation of meibomian gland associated with blockage of the duct. Ref:Ak khurana 6th edition REF IMG
Acute infection of Zeis gland
Acute infection of Moll gland
Acute infection Meibomian gland
Chronic infection of Zeis gland
Diseases of orbit, Lids and lacrimal apparatus