dermatrographic patients and SPT

[twinturbo]

Is anyone else in this unfortunate category of diagnosed dermatrographic urticaria? Ideally in regard to SPTs.

[Macabre]

Not dx but I seem to get something like this when my allergy load is high and I forget my daily meds.

[CMdeux]

Yes, me-- which is why I haven't bothered with SPT for shellfish.   Sure, it'd be positive.  And probably 50-50 odds that so would the negative control and everything else, too.

[krasota]

I can't do skin allergy testing unless it's the dead of winter.  Otherwise I just react to everything, including the negative control.  So lowering my allergen load is essential if I want skin testing.  I don't really have any need for skin testing at this point in my life, though, so it's a non-issue.

[notashrimpwimp]

Is that where your skin develops welts from pressure and you can write on your skin? If so, I've been diagnosed with it and my skin tests remain pretty accurate with a few false positives. My controls remain as they should be. I will have to ask my allergist along with all the questions I've been saving up.

[YouKnowWho]

DS2 has highly twitchy skin, uticaria, etc.

We have two things happen with spts - either we cannot get anything to react (including histamine) or it goes insane.  I swear our doctor does the testing anyway for poos and giggles.  He tends to base true results off the blood test.

[candyguru]

My wife has demographism / solar urticaria.