How is blepharitis caused by staphylococcal infection?

Skin=staph: Staph is a ubiquitous organism on the skin...Everyone has it. It takes advantage of a small break in the skin or perhaps a plucked eyelash follicle to cause an infection. It is generally easy to treat. See your doctor for antibiotics.

Dual inflammation: Staph infections can cause primary inflammation and then secondary reaction to the staph toxin especially from this bacteria. The eyelid margin skin is very thin and super-sensitive to irritants and infection.