Will this small round hole on the bottom of my breast heal on its own? (Photos)

 With conservative wound care this area should heal just fine. Best case scenario is it may take you several weeks it will eventually close over and six months to a year from now you may benefit by a little scar touch up in the office under local. But worst case scenario is in some patients, this area continues to get bigger and deeper so watch for that and if it happens, for sure see your surgeon

Wounds similar to this are quite common in this area. In almost every case, they healed with a little simple attention. This could take 3 to 6 weeks. You should follow this along with your plastic surgeon, and get advice on how to best take care of this area.

Dear Earbuckey,
Because you also had implants placed, you should definitely go back to your PS and see if he/she wants to revise and close the wounds rather that let them heal on their own (which may give you a higher risk of infection).  Hope this helps and good luck!