Why am I breaking out on my chest after 6 weeks post op? (Photo)

I'm 6 wks post op w saline implants. Out of nowhere I broke out on my left breast (the inside of it) & the middle of my breasts. Small, red, pimple-like bumps. I'm not prone to breakouts (never have been). My mom also has saline implants (she's about 1yr post op) & the same thing happened to her at 6 weeks. She's struggled with it ever since and dermatologists, her surgeon, and other doctors don't know what it is. I find it very coincidental that it happened to both of us at the same time. Help?