Even if I go out in a cold place and come back inside, it gets red. It's fine when I wake up or stay home, but when I get out of the shower or come home after work, it's red. I wonder if it's highly likely to be an infection. I have to get up tomorrow and go to the hospital. If I do that, it's fine again... It's been exactly one month since the surgery, and there's no pain at all. The swelling has gone down a lot.