What is a sty?
A painful red bump on the eyelid which is caused by an infected hair follicle or an oil producing gland in the eyelid that has become clogged and infected.
To avoid complications, a sty should never be squeezed. Instead, a hot compress should be applied to bring it to a head. It should then break by itself.
Although rare, sties can lead to severe infection and swelling of the eyelids which requires immediate medical intervention. Therefore, it is best to have the child examined if any unusual swelling occurs.