Are you taking any meds? B/c if you are then hives/rash can be a symptom of an allergic reaction. I've had both and Im allergic to 3 different types of meds. But if you're not on any meds than idk. But it might be worth mentioning to your Dr. It could be caused by your ED you're Anorexic right? It could have something to do with Anemia. Are you always cold like me? I know what its like to get hives so I feel for you. What about your detergent? Are you/ your Mom using a different detergent? Maybe you need one for sensentive skin.Btw what's a mozzie bite? Lol Idk if I've been helpful or not. But this is all that I can think of.
Take Care and God Bless

Yeah, I'm on Fluoextine, but its not like all of the time its just when I notice that I'm holding something cold like a iced drink or a slushy (slurpee) oh and even air conditioning I forgot about that one! Especially driving!
No, I don't think its related to the ED because it doesn't happen all of the time and I've had it been going on for me since my knee surgeries like 4-5 years ago with all of the ice packs. but I know what you mean with the feeling cold all of the time, and no not at the moment through the eating phase I'm going through at the moment.
Yeah, I have HIGHLY sensitive skin, mainly face, but can't even put extra sensitive sunscreen on it most of the time so I usually don't bother anymore, it just burns my face more than the actual sun would! But nah, its not the detergent or soaps because they only come and go around cold things.
Yeah, thanks it helped. You too, thanks :)

I've gotten hives from the cold since I was a child and my allergist treats it as an allergy to the cold (he calls it cold urticaria). In winter months he has me take extra antihistamines to control it and I also take more if I'm going swimming because the cold water triggers it as well. An allergist might be able to help you with this. Good luck.

My son has this. It's cold induced urticaria. Some people have mild cases and others have severe cases where they stop breathing from drinking something cold. Not all antihistamines treat this type of allergy. I give my son periactin during the late fall and winter months. I also have an epipen for him even though it is unlikely he will need it, but its better to be safe then sorry. This type of allergy is uncommon, but as beachshell said you should probably see an allergist to get more info and to have it documented. My son broke out in head to toe hives fro swimming in cold water once. It was very scary!

Yes. Not sure if it's a legitimate allergy, but my allergist, too, treats it just like an allergy to anything else. I take a combination of levocetirizine and montelukast to control any of my allergy needs.

In terms of cold-activated hives, it can also go the other way for me - really hot temperatures can induce my hives. Usually, my hives are painful and internal only (you'll see red blotches on the palms of my hand). So I try to prepare for the cold weather early on (mittens, pockets). Use warm water when washing your hands, etc. Mine can also be induced by other non-allergens such as pressure (e.g. slapping, sitting too long in one place) and scratching. Not sure if it's due to the same thing since I just have chronic urticaria AND dermatographia (two separate but related conditions). My allergist ran some blood work and it seems like the underlying cause of all of this that I have abnormally high IgG levels, which is an antibody that is common with people that have allergy hypersensitivities.

But basically, if whatever you're currently using to treat your allergies isn't working, I would highly recommend following up with your allergist again.

Cold urticaria is nothing uncommon. Whenever you get exposed to any cold substance or feel cold, it might occur. In my opinion, taking an antihistamine would help you. But if it becomes difficult to tolerate, you can visit an immunologist. Try to avoid cold.