Fevers, chills, and night sweats are common signs of infection. But, sometimes infections can fly under the radar and go undetected for months or perhaps longer. Blood cultures and wound cultures can help catch the offending bug. But, more subtle signs like fatigue and worsening pain can also be part of an infection picture.   Recently, I wrote an article about a post surgical infection called Discitis. This case of a post surgical infection was particularly hidden for a long time; eventually, infections raise their ugly heads. When the diagnosis is cloudy and undeterminable, sometimes you have to wait for the ugly head to appear before it can be identified.   Dr. Christina Lasich, MD