If left untreated, it can cause severe pain, pus or blood, plus a foul aroma.
Eventually, they could trigger skin disorders, stomach problems and overall poor health of the body. However, this does not address the main cause of the inflammation, but fundamentally the effect. https://Medium.com/@inspired_kobe_swan_759/is-blepharitis-contagious-what-you-need-to-know-9d65d44eba09