Itchy skin to the point I can't sleep. Help!

Paw of course.

If you mean my post GGmk3 it should have been clear that I was not advising eliminating a swathe of food products, but to look at what OP has been eating.
This is standard advice if any symptoms develop - what have you been doing/eating/using that might have been different.
I do have many years of experience of the effects of certain food groups on auto immune disease (which includes UC, RA, PSC, eczema , IBS etc)
OP also sounds dehydrated and Pae who suffered from uncontrollable hepatic itching especially before his liver transplant but also after, used to knock back a couple of litres of water several times a day.
The sickness is worrying and although OP has had tests in the past, kidney and liver function tests may be appropriate right now. OP, is your wee dark? Are the whites of your eyes clear or might they be yellows?
A telephone consultation is called for.

Phone your GP ! Most of them are doing telephone consultations at the moment, so you don’t have to go out .

Are the kidneys functioning as they should ? Are you dehydrated ?

This is definitely a case of contacting a doctor for advice.

I use an antihistamine, a prescribed sleeping pill and loads of Diprobase. My sleep is very, very occasionally disturbed. I used to have severe eczema as a child. It affects my legs and is a nuisance.
Keep moisturised always.

My daughter in law’s father has been driven mad with itching skin to the extent that he couldn’t sleep. He has just been diagnosed as Type 2 diabetic.

The annoying thing is that manufacturers insist on ’imoroving’ their products, so something that used to be fine suddenly turns into nightmare time.

I started to get itchy skin about 18 months ago, my GP recommended Diprobase which can be bought across the counter in any pharmacy, it works better for me than the Betnovate she prescribed.

You appear to have multiple symptoms OP, especially the feeling sick, wonder if you developed an allergic reaction to something or stress as others have suggested. Hope you manage to alleviate your condition.

May be possible that the stress you are experiencing isn’t helpful.

Please be careful about the advice you give. The description above about how to find what is a food/s is causing the problem is exactly the opposite to an elimination diet. Firstly it's best done with a dietician and secondly, you do indeed illuminate almost everything and start by limiting yourself to very few foods - as advised by doctor or dietician. Once established and symptoms diminished you can then add back each food in turn for a period to track your reaction.

Guessing what food is is causing the problem - or even if it is a problem is not helpful. No self-diagnosis is and it can be dangerous.

Is your urine very dark?

Dermol 500 is useful for dry, itchy skin.

Try Anti histamine as others have said. This also is soothing for me “O’Keefe’s Skin Repair body lotion 48 hour dry skin relief in 1 use”. Hope you get relief soon ??

Just a thought....is the rash on your face a sort of butterfly shape?

I take fexofenadine (from the GP) and slap on tons of gunge (again from the GP). That's the only way I've found to keep eczema under control most of the time. Even then sometimes it flares up and the itch is unbearable. I can keep my hands of it most of the time when I'm awake but scratch and damage the skin when I'm asleep. You need to see your GP again when the surgeries reopen and ask to be referred to an allergy specialist. It's possible that you need a steroid cream or course of steroid tablets to get it under control.

Rub anti histamine cream all over, even the tube of cream we use for treating a bee, wasp or nettle stings ( it’s still anti histamine) should work a treat. ??

Look at your diet. .
Many people react badly to foods in the nightshade group (no not the deadly nightshade, although that’s best avoided!)
I believe, tomatoes, aubergines, potatoes (but not sweet potatoes ) are included. You could google.
Or gluten - so wheat products, or dairy.
Of course if you cut everything out at once you won’t find out what has triggered it. But perhaps looking at what you have eaten recently might help.
Anti-histamine -“full fat” drowsy Piriton especially at night comes highly recommended. .
Fairy non-biological washing liquid, no fabric conditioner, wrights coal tar soap, E45 or Aveeno, and nothing with any perfume in it. (T gel shampoo is good)
Of course it could be eczema and a doctor might prescribe steroids, or it could be hepatic itching (the worst) which may reflect liver function.
Not the easiest time to be seen by a doctor, but do try for a telephone consultation.

Try checking whether anything you use contains sulphates - very drying for the skin. I use all sulphate/perfume/alcohol free products now.

I used to have to cream my skin after every bath or shower, now do it just twice a week.

I also only use oil to clean my face (Argan oil), with a warm cloth. My face no longer gets that dry, tight feeling I used to get after using face wash.

I found that eliminating perfumes from anything I use (shampoo, soap, deodorant, skin cream, laundry powder, etc) solved many similar problems I had. For many years I took antihistamine tablets regularly. I don't seem to need them now.

Try Antihistamine tablets, it’s Hay Fever season

If it is eczema Aveeno is great.