The symptoms you describe and the relation to foods does seem consistent with urticaria
that can be triggered in some people by foods rich in salicylates.
Urticaria is a condition when mast cells in the skin release histamine
after simple triggers such as scratching (physical), but also to temperature change (such as hot shower or cold-induced urticaria), stress
, infections etc.
Foods high in salicylates can also trigger and the foods you mention do fall in that category.
Long-acting antihistamines such as allegra
180mg once daily for 3 months should be tried to see the effect. Removing foods high in salicylates as a trial for a maximum period of 4 weeks is recommended, but not longer if there has no obvious effect.
If there is evidence of tree or grass pollen allergy
, then these can act as secondary triggers.
You can visit the patient information website allergy.or.uk for more information on salicylates if you wish.
Hope that helps.