Sudden or recurring styes can be caused by an overgrowth of bacteria from clogged oil glands. This is known as blepharitis. Blepharitis can develop when you don’t keep your eyelids clean and ...

Although not serious or dangerous in themselves recurrent styes interfere with vision and ... is usually only made once all other possible causes of tiredness have been excluded.

which causes bacteria to transfer between them. While styes are not contagious, reusing the same contaminated products can quickly reintroduce bacteria, leading to recurring styes, which is a ...