Hi welcome to Health care magic forum, You had a rash
on the back, and not cured you. It should be clear that you didn't approach a doctor, or inspite of treatment you didn't get relief.
If you didn't consult a doctor means it is o.k. ifyou are under treatment and no relief means you might be having some external allergen like clothes, under garments, hooks, etc which continuously creating allergy
. Or may be a fungal infection
As you say you are getting palpitation
while entering the doctors room, it could be due to anxiety
that what could be the reason, could it be serious, or some thing of that sort.
I advise you to consult a dermatologist
, for diagnosis and treatment.
Besides i advise you some diet recommendations as avoid taking fish , other sea foods , brinjal, and the thing which are allergic to you.
Dont worry you will be fine , and thanks for calling.