To cut a long story short, I found out I was allergic to fabric adhesive dressings when I had to wear a halter monitor for five days. I'd been have palpitations, which thankfully have turned out to be nothing really, ectopic heart beats which are more than likely hormonal.
Anyway, you have to wear those sticky pad things, like an ECG, but for five days while your heart is monitored by a little monitor thing you carry around with you.
Once they were removed, I had five target shaped rashes on my chest/tummy, which were mega itchy and sore at the same time. Bright red and bumpy, and quite clearly a reaction to something in the adhesive.
I popped along to the pharmacy, but they had a quick look and said I'd probably need a steroid cream to clear it up - so booked into GP. GP had one look and said -'That's an allergic reaction, why on earth didn't you tell them you were allergic to adhesives, I mean really, what did you expect!?' - Erm....I didn't flippin' know!! I've worn plasters all my life, including surgical dressing after 2 sections, with no reactions at all!
I'm not a bloomin' clairvoyant love!! Do GPs think that everyone knows everything about their own health? Why would we need GPs if that was the case!?