As long as you will squeeze the nipple, the discharge will continue,you have to stop doing that if you want the discharge to stop also.
Only a spontaneous discharge from the nipple
of one breast
may indicate breast
cancer but most discharges are from benign (non-cancerous) conditions and most cancers do not have a discharge. I would, however,advise seeing a physician to evaluate this fluid, which they would do in the context of a physical exam, as well as, your personal and family history.