Why is my skin and hair extremely oily after breast augmentation?

My skin and hair is already naturally oily but ever since by breast aug it's been a lot more than usual. I'll literally wake up every morning and the first thing I see is my nose shining! Could it be the medications I was taking? I was taking pain killers (hydrocodone), antibiotics (cephalexin), and muscle relaxers (forgot name). I just stopped using them about 2 days ago and I'm 8 days post op.