To ask if I am at risk here? Suddenly cannot eat without a reaction

You need an allergy test

Histamine intolerance? I have this and have to take antihistamines daily.

Histamine intolerance is an inability to break down histamine in your body, causing it to build up. Certain foods that are high in histamine or that cause your body to release histamine can give you an upset stomach, headache or allergy symptoms. Common trigger foods include fish, alcohol, and fermented or aged foods.

I think you need some allergy testing. They can do allergy testing on blood right now. That means taking a blood sample.

Are all of these foods being eaten/prepared at home? Could it be a cleaning product that’s on the sides/pans/crockery?

My brother had similar. He was prescribed daily antihistamines and an epipen. Please don’t mess about here, your symptoms are quite alarming. GP can refer you to allergy clinic for more tests too.

I think that's risky advice.

Hives plus throat swelling (i.e., airway closing) is a completely acceptable reason to call an ambulance.

This is great in theory, but in reality, if some of us called an ambulance every time our throat started to swell a bit it would border on the ridiculous. Sometimes you self-treat and see how it goes

This is probably a long shot but I know someone who developed all sorts of new food allergies at uni out of the blue. Long story short, she had a raging (but unknown to her) yeast infection. It was so bad that it spread inward and 'ate' through the lining in her stomach so that all the food she was eating was seen as bad by her body and she was developing allergies to all these foods. (This might not be fully medically accurate as it was 20 years ago and I'm not sure of all the details.)

Her only yeast infection symptom was that she was craving sugar but she thought it was stress for upcoming exams. She got the yeast infection treated but then had a severely limited diet for a couple of years and slowly introduced one thing back in at a time.

I agree with posters who said to see your GP as it could be a strange, seemingly unrelated thing like my friend had.

*Look at MCAS
*
She was tested for that she doesn't have it.

Random thought, are you eating all of these things off plates/bowls? I'm allergic to Fairy liquid, although not to the same extent you're experiencing, but I can always tell if the crockery and cutlery has been washed up with Fairy as I get very itchy.

You do need to get a proper confirmation from a doctor. Specifically for the meat, are you reacting to chicken, or is it just mammals? If just mammals, have you any reason to believe that you have been bitten by a tick? Alpha gal syndrome is spread by ticks and causes reactions to mammal meat protein.

Look at MCAS

I'd seen an allergy specialist. Ask your GP to refer you.

She takes antihistamine every day she's on fexofenadine 4 a day

You could use a non-drowsy antihistamine, cetirizine is fast acting and can be bought as a liquid or tablets.

You do need to see an allergy specialist though.

Dd has oral allergy syndrome, also she reacted to peanuts so she has an epipen.
More recently she's having episodes of spontaneous anaphylaxis, she under immunology for this they can't find anything so far. She hasn't needed the Epipen yet but she has an inhaler.

I have had many self resolving anaphylactic episodes (confirmed by an immunologist - I didn't realise I was experiencing anaphylactic episodes as they were atypical) so yes, it absolutely can be anaphylaxis and resolve without adrenaline. But this doesn't mean the next one will not escalate. Have attached an allergy plan which outlines the signs of anaphylaxis.

I have oral allergy syndrome with raw fruit and veg. I do also have hayfever. It gives me an intensely itchy mouth and throat but no hives or smaller feeling airway and it passes after 10/15 min.

what happens if you take antihistamine daily? You can take loratadine if you’re affected by the drowsiness - I’m the same so can only take loratadine. When I’m taking them daily for hayfever, im able to tolerate raw fruits much better

if daily loratadine makes no different you should def go back to gp

I have oral allergy syndrome which started in my teens. I have other allergies too but the syndrome just seems to be fruit and vegetables. Cooking them does work for me. Citrus fruit is fine for me. Your reaction does sound more severe though. I just get the itching in my mouth, although I can't peel carrots for example without my hands being affected.

Get some liquid antihistamine for emergencies.

What did you have with the steak?

Histamine intolerance? There's a list of foods on google with low histamine you could try

Although I took Piriton which works within 15 minutes but leaves me exhausted all day There's another widely available antihistamine about the same price as Piriton which doesn't cause so much drowsiness. Boots had them side by side. Look for the active ingredient in Piriton and choose the one that has a different active ingredient.