It is quite possible to have blocked tear duct from eyeliner using. Eye infection and inflammation are possible for people to develop tear duct blockage. Eyeliner might cause eye infection and inflammation and lead to the tear duct blockage. Actually mascara and eyeliner are very easy to cause eye irritations. Thick makeup with mascara and eyeliner would easily cause eyelashes fallen out, foreign body sensation and a stye. If you do need to wear eyeliner everyday, you should be careful not to get it into eyes and remove it carefully and thoroughly with mild eye makeup remover otherwise the left chemicals would cause problems. Don't share the mascara or eyeliner with anybody else to avoid any bacteria or virus transmitted. And there is a finite period of useful life of every cosmetic items, especially the ones applied to eyes. It is better to stop using the mascara or eyeliner within 6 months after it is opened. Because the germ would stem on it, and with applying to eyes, it can easily spread the germ into eyes and infection would be caused. Hygiene should be always on your mind if you need to wear eye makeup.