I was stung by a wasp for the first time a few weeks ago. It hurt like crazy at the time but I didn't have an anaphylaxis type reaction. Now, nearly a month on, the site of the sting is still red and lumpy, and I have been itching all over but particularly at the site of the sting ever since. I have taken Piriton as suggested by my pharmacist but surely that's not a long term thing? Is it normal to still be itchy after a month? Could this be an allergy but not a serious one?