On the train today and suddenly my face itches like mad, then my chest, then my upper arms and I've clearly been bitten. Couldn't see anything on me and my chest and upper arms were covered by my top. I hit the seat and no fleas or anything obvious jumped up. My friends were in the four other seats in the quad and they were all fine. Obviously I stood for the rest of the journey but what on earth lives on one specific train seat?! Fleas?? Something more niche?? The bites are massive not and still very itchy.