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.

A stye is an abscess which occurs in the eyelid. It usually arises in the base of the hair follicle of an eyelash. Although not serious or dangerous in themselves recurrent styes interfere with ...

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 ...