[metabagel]

I used to experience blepharitis and occasional sties, but of all things what cleared everything up was tea tree shampoo and face wash with tea tree oil.

https://www.healthline.com/health/eyelash-mites

Keep any tea tree oil product well away from the eyelashes. It's not actually necessary to treat it there, and you'll regret it if you get any of the product in your eyes.

[sdenton4]

Mine was caused by doing stressful grad school things, keeping ridiculously bad sleep schedules, and staring at a too-bright monitor for dozens of hours per day. These added up to rubbing my eyes a lot, which led directly to styes.

After reducing my monitor brightness, the problem went away.