I am glad that you have posted a pic here, and though it does not work as well as a face
interview, it does help us.
I would like to say that these spots do look like inflammation of the oil glands of the face. Therefore, in a way they may be primordial acne or whiteheads. A yeast or fungal infection is also a possibility, however, in either case the association with antibiotic usage some time back does not seem to connect with this lesion.