The past 2 years when on holiday, last year Egypt this year kenya, After swimming in the sea for a few mins my skin feels as though its burning and I get a red rash, I have to rinse the water off straight away, it's normally ok after this, my 6 year old and 25 year old have the same problem, seems heredatory? my 6 year old and myself suffer from prickly heat quite bad, is this related?I myself am not really bothered, but my 6 year old loves snorkkling and is now unable to do this. I would appreciated any suggestions or remedies. thankyou