Surgery at the end of january. near one of the incision sites is round red rash. it seems to get worse after i've showered or while working out?

Who Knows..: The site rash may or may not be directly due to the surgery. There is just no way of knowing for sure. Having said that, it would be prudent to keep a watchful eye on the condition. Certain activities can increase the blood flow to the area and cause a temporary redness. To remove all doubt, give your surgeon a call. It may be as easy as using a topical cream to address the condition.