Dear happyheartsfan
Sorry to hear you are suffering with the same itchy rash. My husbands rash has improved greatly which I think has been due to 2 prescritions. First is Atarax antihistamine tablets, which he takes at night and second is a cream called Elocon. Within a week of using the Elocan cream the rash had calmed right down. You can probably get these prescribed by your GP rather than wait to see the Dermatologist.
A word of warning to you and others though. The rash came back on my husbands face and we can only put it down to being in the sun so if we see the sun again wear plenty of sun cream and a hat!
Happyheartsfan, hope this has helped – we know how hard it can be for you and your wife but it WILL get better.