My daughter is 18 & on her period & has a discharge from her nipples is this normal?

No: Discharge from nipples can be normal, but it can also be a sign of a pituitary tumor or problem with the breast. My recommendation would be for her to see a physician to get some testing done just to be sure. Good luck!

Can be: Galactorrhea can be caused by nipple stimulation, thyroid disease, some medications, pregnancy, and prolactinoma. A prolactinoma is a tumor of the pituitary gland. Have her see a gynecologist to be evaluated.