A stye (medical term: hordeolum) is a common eye condition characterized by a small, painful lump or bump on the edge of the eyelid. It occurs when the oil glands at the base of the eyelashes (called ...

Your son's stye is also known as a chalazion or Meibomian cyst. It is a small lump on the eyelid due to a blocked oil gland, and can occur on any eyelid. Your son's eyelids contain many oil ...