If he did, this is an injection of saline mixed with lidocaine and epinephrine
and bicarbonate. If you had general anesthesia
it is less likely, but if you had IV sedation, it is probable that you had those injections. Are you on antibiotics? Are you using chlorhexidine gluconate soap to cleanse your skin? The rash is likely a reaction to a specific injection, soap, bra, something new and probably a medrol dose pak will clear it up. Good luck.