What is a chalazion?

A chalazion is specifically a lump that forms in the eyelid due to a blockage and subsequent inflammation of the meibomian glands, which are responsible for producing the oily component of tears. This condition typically arises when these glands become obstructed, leading to the accumulation of oil and the formation of a cyst. Unlike a stye, which is characterized by infection and painful inflammation of a gland, a chalazion usually develops slowly and may not cause pain.

Understanding the nature of a chalazion is essential for proper diagnosis and treatment. It represents a non-infectious condition that can occur as a result of long-standing inflammation rather than an acute infectious process. Therefore, identifying its correct characteristics helps in managing the condition effectively.