WHAT IT IS AND WHY IT HAPPENS:
A stye is an infection at the base of an eyelash caused by bacteria. Usually these live on our skin and are harmless but sometimes they are transferred to the eyelid and if the skin is damaged, the bacteria invade and take hold.
“Symptoms are a painful and tender red lump on the eyelid. It can feel like something is in the eye and makes it water,” explains Leanne Nguyen from the Australian College of Optometry. The lump can become bigger and have a white or yellow top.