Christmas rash

[Buttermill]

Hi any idea on what this could be? I will be going to see a GP but they are obviously closed currently and I go on holiday on 27th December. Started 2 days ago I thought an allergy but still comes and goes. Not always itchy worse at night , started on thighs arms and lower legs and abdomen now mainly on buttocks thighs and abdomen. Will come and be present for about 3-4 hours then go then reappear randomly later i can literally sit and watch the pink dots appearing. Some are hive like others aren't. I haven't changed anything in my diet or washing so dont understand. Dont think its bugs I did a deep clean just incase but no one else in the household has it. Thanks for the advice

I'm allergic to Christmas trees (all conifers) and come up like your first and second pics. Have you tried an antihistamine?

I have thanks yes it helps when I get the itchy ones this mornings isn't itchy which is good and its already cleared but I can see a new patch starting again. Very odd must be difficult be allergic to christmas rees they are everywhere. I have an artificial one so don't think its my tree I can't put my finger on it im now thinking is it bites but it couldn't be surely if only on me and no one else I also don't think bites would disappear so quick. How long does your allergy rash stay for @JoyeuxNarwhal