H.M.
K.,
As a child I also had a clogged tear duct and they did a minor surgery to open it up. I would suggest talking to another Dr. at this point. It does not sound normal for her to be having that much swelling or discomfort. If it is a chronic infection I would not want it to do any damage to her eye and better safe then sorry.
I would suggest calling Dr. Alan Goldstein for a referral ###-###-####and you are free to tell him that H. Marton referred you and ask for his suggestions to. He is wonderful.
All the best,
H.