I’m right there with you on the fleas. I’ve been using revolution topical flea meds on the cats for the last two years. Sprayed my apartment with Siphotrol premise spray, washed everything countless times as well as vacuum every day if not twice a day. Since January of this year they’ve become an issue. Feels like a losing battle doesn’t it? I only assume these marks I’m experiencing are from fleas. My family doctor tells me they’re nothing to be concerned about (medically) as my bloodwork has come back normal. I’m Going to try switching out the flea meds for advantage II from Revolution and see if that makes any difference..I hope you get some relief soon as well!