My DS started having this reaction last summer. It's mostly when we're on the coast, over Christmas. I can't remember the repellent we ended up getting him, it was a roll on with a green label. I also ended up getting him a cream from the chemist that worked in three ways - it had an anaesthetic, anti inflammatory and antiseptic effect. It really helped with the bites. I normally don't like using that sort of stuff on my kids, but the poor boy couldn't sleep properly, he kept scratching and crying out all night.

Having said all of that, it sounds as though a visit to your regular GP could be a good idea. Do you get alot of mozzies where you are?