Patiently Waiting to See Results

[catsrlife]

Back at the end of July I got this rash on both of my forearms. It started on my right and continued to the left. It was on the top and side. The rash has bumps that would pop with clear liquid if scratched. They would almost crystalize and scab up. They reminded me of chicken pox. They would scab for weeks and not heal much at all except for the blood clotting. If the scab was scratched off, it would bleed and bleed until it scabbed up again. The skin has lost its pigment where the scabs are. I figured it was probably either the plant I had trimmed around the 15th or some reaction to the magnesium complex I was taking or an allergic reaction to the asthma meds I was on. I stopped the asthma meds and the magnesium. The rash seemed to get better but when I took the asthma meds it flared up again so I went to the urgent care as my doctor was unavailable.

The UC doctor said it probably wasn't the meds and asked about my diet. I said I was strict keto. I usually am, but there is a story around this. I feel amazing on keto. When I eat sugar, wheat, and starchy veggies I feel horrible. Blood sugar goes up, IBS type symptoms, brain fog, etc. But I have a horrible addiction to carbs so I blow it sometimes and after Mom died in 2023, I fell off the wagon. No rashes, just weight gain. I finally went back on keto and then around that time had a piece of pizza (or so, it's hard to stop the carb rush.) So I was strict keto, off and on. She ignored that and prescribed some allergy meds. It didn't go away.  What was happening by then was that the rash was now on my upper elbows, both of them, on the back of my arms. It starts with a very itchy bump, spreads around it and sometimes just burns like crazy and other times just itches. Then it started on the sides of my knees on the oustide, a little bit down the sides of the calves. It's not as bad there as it is on my arms even though it comes and goes (and so does wheat in my diet.) I then got three tiny blisters on each hand, 3 on the insdie of my index finger on the right hand and 3 on the inside of middle finger of my left hand. There is still a little scab there even though it was two weeks ago. No more have appeared on the fingers. But right now the back of the arms above my elbows are starting to itch.

At some point I started to think mites from the possum that was sneaking into our house but it's been 3 months and they would be dead already. It wouldn't be from humans because I don't go near any humans although I did take an Uber to the doctor and the bus back. Plus, it's symmetrical. It starts on one side and is almost identical on the other. 

I did my DNA with Ancestry and MyHeritage. I don't have the HLA-DQ2 or HLA-DQ8. I do have HLA-DQ2.2. I took the blood test but it was negative. Then again, I don't eat wheat every day. I rarely eat it except for lately when I've been preparing for the blood test if I have to take it again. I don't like to. It makes my joints hurt, gives me brain fog, stomach problems, I sleep in the middle of the day, etc. I have a doctor appointment tomorrow. I hope that she will be more serious about this than the UC doctor was. 

So I have no idea. With my luck they'll magically disappear before the doctor appointment. That's what happens with everything.

[trents]

Welcome to the forum, @catsrlife!

Celiac disease can be diagnosed without committing to a full-blown "gluten challenge" if you get a skin biopsy done during an active outbreak of dermatitis herpetiformis, assuming that is what is causing the rash. There is no other known cause for dermatitis herpetiformis so it is definitive for celiac disease. You would need to find a dermatologist who is familiar with doing the biopsy correctly, however. The samples need to be taken next to the pustules, not on them . . . a mistake many dermatologists make when biopsying for dermatitis herpetiformis. 

[Scott Adams]

You've done an excellent job of meticulously tracking the rash's unpredictable behavior, from its symmetrical spread and stubborn scabbing to the potential triggers you've identified, like the asthma medication and dietary changes. It's particularly telling that the rash seems to flare with wheat consumption, even though your initial blood test was negative—as you've noted, being off wheat before a test can sometimes lead to a false negative, and your description of the other symptoms—joint pain, brain fog, stomach issues—is very compelling.

The symmetry of the rash is a crucial detail that often points toward an internal cause, such as an autoimmune response or a systemic reaction, rather than just an external irritant like a plant or mites. I hope your doctor tomorrow takes the time to listen carefully to all of this evidence you've gathered and works with you to find some real answers and effective relief. Don't be discouraged if the rash fluctuates; your detailed history is the most valuable tool you have for getting an accurate diagnosis.