i had it when i was young. my husband still has it now.
you gotta keep massaging the duct and keep putting the eyedrops.
sometimes yellow or green means the duct abit infected already.
what i used to do is purposely yawn every few hours to allow the tears to come out.
for infant very hard to do that, so we can onli put eyedrops n massage. dunnid to worry, as long as doc never say will affect eyesight then it's not a big prob