For the past hour or so, DS has been feeling very warm. I just took his temp before bed and it was 102.1. He isn't acting sick at all, just really tired. He took a long morning nap and then skipped his afternoon nap, so that explains why he just almost fell asleep in his high chair. He's been a happy baby all day and hasn't shown any other signs of being ill. Could this just be teething? Or maybe he's warm because he's so tired? Also, he's a warm-natured like his daddy, and I had pants on him earlier because he's been bruising his knees crawling around in shorts. I took them off maybe 2-3 hours ago. Could this maybe explain the fever? I gave him some tylenol before bed and of course I'll check his temp again in the morning. Would you be worried? I don't know what's considered a serious fever for a 1 yr old.