Thanks for the suggestions

Thanks chums for all your non itching comments in response to the last post. I'm going to try crocheting along the inner edge with something that's not wool but if that doesn't work I shall try wearing a pair of (clean) knickers on my head under my hat. Remembering to remove them when going indoors would be the thing. I did get some pretty weird looks today for hat without knickers. Not me without knckers you understand - just hat.