I was going to say and suggest the same thing. I used to scratch myself raw and I got the same bumps. It drove me to distraction.
I thought my Dr was going loopy when he suggested an allergy med, but it worked wonders in just one try. I have since found I have intollerances to things that never bothered me before (wheats and external items). I don't have to take an antihistamine all the time, only when I get itchy.
Sounds weird but it really works.
Check out; http://www.nlm.nih.gov/medlineplus/ency/article/003220.htm
This one is on Scabies;
I have been getting itches and rashes, gradually increasing in intensity and occurence in the last 12 months or so too. I saw an allergist, and showed allergic reactions to everything I was tested for, including the control test
He prescribed antihistamines twice a day (Telfast 180mg morning Zyrtec 10mg evening), which works out to be quite expensive. After a bit of trial and error, I decided that I would just take the Telfast when required, to reduce expense and also exposure to another medication. This seems to work for me fairly well, but as you already have a nasty allergy to kiwi fruit, it's probably worth getting tested by an allergist to see if there are any other issues to consider.
I honestly believe my problems are caused by the existing medications I'm on, and will be attempting to reduce them in consultation with my doc.
Good luck with finding a solution.