You will know right away if you have an infection. Fever, headache, nausea or vomiting, feeling fatigued or tired, and swollen lymph nodes are the tell-tale symptoms of a bacterial infection. For wounds, your infection will cause swollen lymph nodes, pus around or oozing from the wound, pain around the wound, warmth or swelling, and redness in the area of the wound. Symptoms of an infection are similar to burns: a bad smell around the burn, pus or fluid coming from the burn, warmth or swelling on the burn area, swelling and redness in the affected area, and increased discomfort or pain around the affected area.