Everybody can get flea bites, just not everyone's skin reacts to it. My dogs use "Frontline Plus", and for more than a dacade, I've been happy with the product,. I was told that Frontline shouldn't be applied right after the dogs being bathed. It takes the grease on the skin and fur to spread over the entire body. However, if I were you, 好婆, I would get rid of the current mattress & box spring, wash all the linen (including curtain) in hot water, and have the exterminator spray the whole house, inside and out. Good luck. By the way, is it possible that the source of the flea is not your dogs? Could it be from your workplace or yard?