My son had a fever on Monday and his forehead and temple swelled out at the same time. The next day, he still had the fever and then broke out in hives all over. This can be a common viral response for him, but tonight, his lower cheek swelled out on the right side (same side as temple and forehead swelling on Monday) and he doesn't seem to have eaten anything new that we can think of except a possible hint of wasabi-like seasoning?