It's normal for wounds to feel warm when it's starting to heal because your body is fighting bacteria or germs. However, if your wound still feels warm after around 5 to 7 days, it means your body is already fighting an infection. It's also normal to have some redness on your wound when you've just had it. However, if it remains red and becomes swollen after 5 days, then it's an indication that it is not healing properly. A foul smelling or discolored discharge are also definite signs of infection.