This has been already referred to as occurring in malignant œdema, black
quarter and other gas producing infections. It may also come from
lacerations made in puncturing the lachrymal sac, and from fracture of
the margin of the orbit—the air entering the connective tissue in this
case from the cavities of the nasal sinuses. The lid feels puffy and
crackles when pressed and apart from a general infection it requires
only soothing and antiseptic dressings.