Can anyone tell me what is this? I started off with a rash within 72 hours (Photos)

10-21-16 under breast moderate smooth plus 325cc my 3rd surgery this was a remove and replace. I'm concerned what do I have what is this how did this happened?? My suitchers on both sides were sticky out had to be cut off when I would go in for follow ups within 1 week I started with a rash now this. I'm on ciprofloxan 750, it looks like there is something there I'm scared my dr wants to see me first thing in morning she says I caught infection???

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