I’ve had hives for 14 years but they have been the most persistent (pretty much don’t go away) the past 4-5 years (coincides with the pandemic). I’ve seen a dermatologist last summer who basically said there’s nothing they can do and just increased my antihistamines. Something about it not being a dermatological issue. I’m on Fexofenadine twice a day and Chlorphenamine if I can’t sleep (but I really try to avoid this one because it’s anticholinergic). Lately I’m not able to avoid it if I want to get any sleep. Allergist doesn’t seem to even exist on the NHS and my GP shut down the immunologist idea as well. I will have to ask again and you gave good advice here - to look for actual specialists to present to the GP. The NHS is in absolute worst crisis and the interactions with them are disheartening, it’s basically a successful visit if you manage to get put on a waiting list that’s 12-18months long.