Congenital dacryocystocele is an uncommon consequence of congenital nasolacrimal duct obstruction: it is believed to occur as a result of a concomitant upper obstruction of the Rosenmuller valve and lower obstruction of the Hasner valve.This causes accumulation of fluid in the drainage system: the sac is initially filled with mucoid material with a grey-blue cystic swelling just below the medial canthus. Secondary dacryocystitis frequently develops within days or weeks