What are these bloody/pimples on my nipples? (Photo)

These are sutures placed in the deep dermis that are supposed to dissolved.  Sometimes the can come to the surface and cause these pimples and openings.  They almost always heal on thier own.  Apply antibiotic ointment when they occur.  Once all the sutures either dissolve or come out, these will stop.

Dissolvable sutures sometimes necessitate through the skin before entirely disappearing. This can create small sterile abscesses. Treatment is generally good wound care. In any event report it to your surgeon.

The blood filled cysts that you showed in the photographs you sent are, in fact, dissolvable sutures that your body is trying to dissolve.  The process of dissolving the suture is also creating some small blood filled cysts.The technical term describing these dissolvable threads and their coming to the skin surface is "spitting sutures".  The entire process that the edge of your areola is going through now is controlled by your immune system which is trying to protect you from the foreign body material contained in the sutures.  I would highly recommend you call your personal plastic surgeon and have a consultation in the very near future in order to decrease the amount of scarring that these dissolving sutures may create.