My Incision is Open? What is the White Area in the Middle? I Am Almost 4wks Post Op. How Can This Be Fixed? (photo)

Get posted photo of a minor wound edge necrosis and separation or dehiscence. Local wound care is all that is needed. 

It looks like you incision has slightly seperated. It is best to see your doctor to provide the appropriate wound care necessary.

This should be seen by your surgeon. The blue I see looks like an extruding suture that probably should be removed, and then the incision will likely heal promptly. I do not see any implant in the incision, so the level of concern is low but real. 

All the best. 

It appears that you have a superficial wound opening but this condition should not be taken lightly.  The inframammary crease incision is the most common incision used for breast augmentation however it is at the bottom of the breasts and all of the edema fluid will drift to this location.  A scar is actually its weakest point 2 weeks after surgery.   This type of wound separation requires plastic surgical expertise to ensure that the implant does not become exposed.  Once exposed the implant will likely need to be removed.  

You are right in calling your surgeon .This looks like a superficial healing problem but since there is an implant involved, it should get checked out.