My 4 yr old has had multiple little pimples cropping up every week or so. Her Pedi suggested it was bedbugs and we had the house checked to no avail. 2 months later, checked again. Nothing. No bedbugs, no fleas. Just some spiders hanging out like they normally do. She's not in diapers at all, she's potty trained. But every few days she'll have a group of pimples. Her arm, her bum, inside of her thigh, her neck. Any idea at all what this is and how to treat it? It's driving me crazy knowing my baby has itchies that I can't fix.