Hi @brie, I don't have the answer for your question but I thought I would share some articles I found that might give you more information on the topic.

Allergies and the Immune System
— https://www.hopkinsmedicine.org/health/conditions-and-diseases/allergies-and-the-immune-system

Connecting the Dots Between Allergies and Autoimmune
— https://www.benaroyaresearch.org/blog/post/connecting-dots-between-allergies-and-autoimmune-disease

NIH scientists find link between allergic and autoimmune diseases in mouse study
— https://www.nih.gov/news-events/news-releases/nih-scientists-find-link-between-allergic-autoimmune-diseases-mouse-study

@gonpros @beanie300 @looking4advice @fox940 @bac10 @lizwhite80 and @techi may have some thoughts or suggestions on your autoimmune and allergy question.

It's interesting that you should write about the auto immune system and allergies. I was thinking of trying an anti histamine because of the reaction I have had to some injections I had in my scalp. They think I have discoid lupus and gave me injections which have had a horrible effect. My hair has fallen out in a big clump and I have itching all over my scalp which is now much worse than it originally was. My husband was suggesting I try an anti histamine.

I was diagnosed with lots of environmental allergies at 18 and did allergy shots for a short time. At 22 I was diagnosed with SLE (Lupus.) At about 40 I was diagnosed with (fragrance) contact allergies, but suspect those reactions started at about 30. And at 42 I was diagnosed with Multiple Myeloma. I had a stem cell transplant in June so now I'm wondering how that may affect my allergies. I'd say there's a good chance that they're all connected but the connection would probably be a disfunctional immune system. In regards to itchy scalp and hair loss – I'd look into contact allergies and those are rarely helped by antihistamines, you have to stop using products that trigger it and avoiding fragrance in household products is very hard.

I am going to try patch testing with my dermatologist and I also have an appointment with the rheumotologist. Thank you for your thoughts. One of my dermatologists thinks I have discoid lupus plus my nerves are misfiring which is a neurology problem. I shall keep on looking into all of these things.