A chalazion is a swollen, pain-free lump on the eyelid. It gradually forms when the meibomian gland, a sebaceous (oil) gland, is blocked. A chalazion is sometimes called an eyelid cyst or a ...

Medically reviewed by Johnstone M. Kim, MD Swollen eyelids, top or bottom, can have many causes, including allergies, infections, and blocked oil glands. While most aren't serious, eyelids can also ...

The primary causes of a chalazion are obstruction of the oil glands (meibomian glands ... Blepharitis does not cause a lump on the eyelid. However, blepharitis can increase your risk of getting ...

They contain two different types of glands (sebaceous & meibomian), which secrete ... or chalazion (a small painless lump that forms on the eyelid). There are basically two types of blepharitis ...