Bite

Based on your description, it sounds like your son might have developed an infection from the bite, especially given the redness, puffiness, warmth, and itchiness. These are signs that could suggest cellulitis or another localized skin infection, which can sometimes happen if the skin was compromised and bacteria got in. It’s important to manage this condition carefully, as infections can sometimes spread or worsen if not properly treated. The presence of a lump could mean several things – a local allergic reaction, an indurated area from the body’s immune response, or even a reaction to a substance like venom or saliva from the original bite. Since you mentioned being on a hike, a tick bite is indeed possible, particularly if the area develops into a "bull’s-eye” rash or if your son experiences flu-like symptoms, which would necessitate a closer look for Lyme disease. However, the immediate concern seems to be the apparent infection. If the redness is expanding, there’s increasing pain, or if his general condition changes (e.g., fever, fatigue), it’s crucial to seek further medical evaluation promptly. Treatment can involve antibiotics but requires professional assessment. I’d suggest following up with a healthcare provider, stressing the changes you’ve observed, so they can decide whether oral antibiotics or other interventions are needed. For now, keep the area clean, avoid scratching, and monitor it closely. If you notice any rapid changes or systemic symptoms, don’t hesitate to seek a more urgent care facility or even the ER. Waiting without seeing improvement could risk complications.