My son has bites on him, we literally checked our place from top to bottom and we see not nothing. Only thing we found…

My son has bites on him, we literally checked our place from top to bottom and we see not nothing. Only thing we found was a red ant, we do have new carpet and he loves playing on it and rolling around on the carpet, but I still don’t know why he’s breaking out. There’s nothing in the cracks of the carpet etc, etc, I’m really worried because it keeps appearing within a few days, I’m not sure if he’s allergic to something inside our home or what. After his bath we lotion him with coco butter or medicated itch lotion. Could he be allergic to the carpet? Feedback is greatly appreciated. Thank you.😊