There's one particular bacterium that leads to stye infections: Staphylococcus aureus. According to Tina Singh, MD, an ophthalmologist at Duke Eye Center, it's one of the most common bacteria on ...

Internal Stye: Develops inside the eyelid and is less visible but ... Sensitivity to light. - Chronic eye conditions like blepharitis. - Touching the eyes frequently without washing hands.

Styes are usually not related to any disease and do not harm the eye or vision. You mention your son's immune system. Although any persistent skin infection should alert you to possible low ...