Narsolacriminal Obstruction (EPIPHORA)

Respected Sir, I am Praveen 23 years old,My doctor diagnosed me with NLD obstruction (Epiphora).I have been Regularly getting small amount of years from the past month..what are the reasons that I got this problem? Is it cause any dangerous in further days? He suggested me "PEDIMOX Drops with(E-BAL) Tablets, Is this really Cause any serious?? & he suggested me with "Gentle massage" for 15 times/session... But I am getting nervous about that EPIPHORA,when some people seen me,they asked why are you crying???It makes me feel inconvenience I am regularly using laptop & Mobile,these Epiphora makes feel trouble while I was in work I forget one more thing,In 2015 I met with an accident,Under the left eye I got scratches,Is that related to these EPIPHORA, Please sir,Can you please clarify doubts which I raised above??