Common signs of an infected bug bite may become evident a few days after the initial bite. These symptoms can include increasing pain or tenderness around the bite site, redness and inflammation that continues to spread, warm skin in the area around the bite, and the formation of pus or other discharge. The bite area might also become hard or develop a growing wound, known as an ulcer. In more severe cases, sufferers may experience chills, fever, swollen lymph nodes, and a feeling of general unwellness. It's important to remember that these symptoms can vary depending on the type of bug bite and the individual's immune response.