unbearable bumpy rash

[theelephantgirl]

I'm a 26 year old female with hypothyroidism and possible polysistic ovary syndrome. About a year and a half ago-just as my thyroid problems were getting bad and before I was put on treatment for them- I got unbearably itchy skin that would keep me awake at night and began to come up in these ugly, small, round, bright red bumps on my arms and legs and thighs.
It's over a year on now and I'm on 25 mg thyroxine (though I think I may need a higher dosage) and the rash is still there, worse than ever. Not only is it on my arms and legs, but also the base of my skull, my ears, palms of my hands, soles of my feet and my back. I am permanently itchy and it's just unbearable.
I've been seeing a dermatologist and so far have been treated for eczema with betamethasone 0.1% and Mometasona (to no effect) and for folliculitis with  Canesten cream, doxicyclin for 3 months and fluconazole (again to no effect). I have had swabs that've come back negative and two skin biopsies testing for dermatitis herpetifomis and both have come back negative. I have cut gluten out of my diet however, as I've noticed than whenever I eat it my skin is even itchier. I've also noticed that if i ever happen to cut or injure mysef (such as get a cat scratch) instead of healing, it will turn into these itchy bumps.
The itching is the worst thing, sometimes it's so intense it hurts. I take 10 mg cetirizine in the morning and 25mg of atarax at night, but they don't really seem to help and I've also tried fexofenadine.
The only thing that seems to have improved it is Sudocreme. It helps my skin to heal but it doesn't help with the itching.
I've just come back from my dermatologist who doesn't know what's wrong with my skin and I'm at my wits end, anyone have any suggestions??

Thank you

[theelephantgirl]

Thank you Maatson. How is this treated? I'm at the stage where I'll try anything.

[maatson]

My clinical impression is Prurigo nodularis.