Rash after years on Humira

Hi Everyone! I have been on Humira twice, first time from 2008-2012 then again from 2015 to now. Lately, I have been noticing that I am breaking out in rashes suddenly. At first it didn't worry me much because they were just small patches of dry red skin on my legs and would clear on their own. I did have 2 occasions where my whole stomach and back broke out in dry itchy hives, but again went away on it's own. Recently the same type of rash formed on my chest and face which did not respond to benedryl. It was still bad this morning so I went to urgent care and was given a round or Prednisone. Now, after 60mg pred this morning, it seems like things are clearing up. Has anyone experienced this before? I called my GI yesterday and he said to skip my shot this week, but that it does not sound like it is from the Humira. I take Humira once/week and don't think I want to be on it anymore because I am becoming more and more convinced that it is what has been causing my skin issues all along. I developed serum sickness on Remicade and Cimzia wasn't effective for me so I am worried about what else there is to try - but I will definitely be having this discussion with my GI in the near future. Thanks for any insight you may have!

Thank you! I has a test done in September to test the drug levels in my blood, but I don't think that looked at antibodies specifically. My GI wants me to re-do the blood work again now that I'm taking it every week, but it is a specialized blood test that carried a $500 co-pat that I am not interested in covering again. Thanks for the info!!

Hmm. maybe I should have it looked at closer. My son and husband have extremely sensitive skin so we are careful to use all scent and dye free cleaners and bath products, but you say this chemical is found in those products as well? The only drug I am taking right now is Humira, which makes me think that is it. I also wonder if it's just my Crohns since I tend to have a lot of external manifestations such as mouth sores, psoriasis patches, and random skin sores that come for a day or two before subsiding on their own.

I'm just copy paste my previous post (topic Burning/itching from sun exposure) in case your rash might be related with sun sensitivity as now we have spring.
I was on Humira 5 years ago, I had 13 doses in total (1 per 2weeks), started in January and on July already was hospitalized in emergency due to terrible sun sensitivity (1% possibility for this side effect), it developed gradually, but finally was too strong, so I refused to take Humira anymore. Had to wear 100 spf even at home with curtains closed and could't go out at day time even 1 yr after I stopped. After 2 yrs without Humira sun sensitivity was gone, although I don't take sunbaths anyway. Humira could induce lupus or lupus-like syndrom, luckily, mine was lupus-like. Also, Humira, possibly along with sunlight, induced me permanent IV level sensitivity to Methylisothiazolinone and Methylchloroisothiazolinone which are preservatives in cosmetics, cleaners, washers etc. I know this for sure because I could use cosmetics with that stuff before. Maybe you have an allergy to some other substances, so it would be good to do tests for various chemicals and other stuff, so you could to avoid them.
So anyway Humira most likely is responsible for your rash, and I would advice you to observe if your allergy is getting worse with every shot, so take pictures of your body places of Humira's shots and of you face and chest when allergy occurs. Maybe you are lucky and will be able to rule sun sensitivity out.
Starting with some 8th Humira shot, I was given clemastinum shots just before Humira, and 2 last months dexamethasone shots after Humira. You could try those too even if Humira induces you some other type of allergy. And do believe you will get better.