Hi, my 10 month old has gotten a bunch of red bumps on his back, sides, nape of his neck, legs, and arms. At first, I though it was bug bites when we traveled out of town for the holidays but these bumps have started to spread and continue to show up since we've been back home. I have not made any major changes in detergent or foods. What can they be? Could they be an allergic reaction to something?