Is it possible to have fleas but not to be able to find them? We were a week late with our cat's Advocate spot-on treatment this month. Last Wednesday after an evening on the sofa I realised I was covered in little red bites mostly on my buttocks and torso. DH had just a couple of bites. Same happened on Thursday evening. We gave the cat her flea treatment and on Friday I bought 2 large cans of Indorex and sprayed and hoovered whole house following instructions and washed all throws, bedding, pets bedding etc. I continued to hoover, following the Indoret instructions every day and for 3 days I was bite free. However last night, after a few hours on sofa I was covered in bites again. I set up a flea trap overnight but there was nothing there this morning. Today I have pretty much dismantled the sofa, hoovering everything but can't find any signs of fleas.
The bites are small raised itchy red spots in clusters on the top part of my legs and torso and are definitely occurring when I'm on the sofa. The skin swells around them and feels hot. My husband has only had one or two small bites but I am usually much more susceptible to mosquito bites than he is. If I treat the bites with antisan cream at night and take piriton before bed, by the morning the bites are completely gone. The cat is black with long hair so it is impossible to see her skin to check for bites but I have combed her extensively and not found any fleas.
What more can I do? Is this fleas or has some weird invisible parasite invaded my sofa?