White pimple like onnipple, not itching and no hurt. when squeezed, it hurts a little, and does not pop out.been there for 4dys, age 27 male?

Probably ok: This sounds benign. But if it persists beyond a month or becomes worse, bleeds, or infected then you should see a physician form possible cytology or biopsy.

May not be a pimple: It may be a small cyst known as a milia. This cannot be popped out unless a small cut is made over the cyst before it is squeezed out. You might want to have this done by a doctor who uses sterile equipment.