Is It A Stye Or Chalazia? Important Facts You Should Know

Styes Are Caused By Bacterial Infections in the Meibomian Glands

Styes are the result of bacterial infections that occur in one of the meibomian glands (which are also referred to as tarsal glands). These glands can be found near the rim of the eyelids located within the tarsal plate. Meibomian glands produce an oily substance called meibum. Meibum is responsible for stopping the evaporation of tear film in the eyes. It also helps to trap tears between the eyelid ridge and the eyeball, thereby preventing tears from spilling out onto the cheek. When meibomian glands are dysfunctional, they can cause dry eyes and blepharitis (an eye condition characterized by eyelid inflammation). Styes occur when bacteria get into these glands and cause an infection.