Dear Lybrate user
You have not mentioned the duration of watering from eyes. If it is since long, say since age of 2 months she might have unopened tear passage. If there is no simultaneous infection
massage over lacrimal sac would help opening the passage. Please consult nearby ophthalmologist
to learn the proper technique of massage.
If massage is being performed for more than 2 months and passage is still blocked, she might require probing- a short OT procedure by ophthalmologist to open it. However, if there is no concurrent infection, you may wait for 2 months with due precautions regarding hygiene.
If it is of recent origin, there may be functional block or some other reason.
However, I stongly recommend you to consult the ophthalmologist as early as possible and get thorough examination and diagnosis. Sometimes watering is due to some serious unidentified lesion in eye.
As far as teeth eruption is concerned, please consult nearby dentist