When the hives won't stop.
A clinical investigation guide for adults with chronic spontaneous urticaria — six weeks or more, no identified trigger, and an allergist workup that hasn't moved the needle. Four pathways the standard panel rarely tests for.
A workup for the hives that keep coming back.
This guide is written for the patient whose hives have outlasted the standard six-week threshold for 'chronic', whose allergen panel has been clean, and whose H1 antihistamine is no longer carrying its weight. It maps four pathways by which an unsuspected H. pylori infection has been associated with chronic spontaneous urticaria.
It is not a treatment protocol. It is the diagnostic conversation, written down, so the next appointment is more specific than the last.
-
i.
The clinical signature of chronic spontaneous urticariaHow the picture differs from physical urticaria, vasculitis, and mast-cell activation syndrome.
-
ii.
Four pathways the allergy workup rarely tests forAnti-FcεRI autoantibodies, molecular mimicry, Th2 skew, direct IgE — with the evidence tier for each.
-
iii.
Why an empty allergen panel isn't the end of the workupAutologous serum testing, anti-FcεRI antibodies — the next-step lab logic.
-
iv.
Labs to request beyond a basic panelAnti-FcεRI, basophil activation test, thyroid antibodies, vitamin D — read together.
-
v.
Testing options for H. pyloriStool antigen, urea breath test, biopsy — trade-offs, costs, and what each rules in or out.
-
vi.
What positivity changesEradication, urticaria activity re-scoring, follow-up at 12 weeks — what to expect.
-
vii.
A conversation script for the next appointmentThree questions, phrased clinically, that route the workup toward the gastric pathway without overstating the case.
How an unsuspected infection keeps the mast cells busy.
Chronic urticaria in the presence of H. pylori rarely runs through a single pathway. The guide treats each as testable, with evidence tiers explicit.
Anti-FcεRI autoantibodies
A subset of CSU patients carry IgG autoantibodies against the high-affinity IgE receptor. H. pylori has been associated with their emergence and persistence in susceptible hosts.
Molecular mimicry
Cross-reactivity between H. pylori epitopes and dermal autoantigens drives non-specific mast cell degranulation in susceptible hosts.
Th2 immune skew
Sustained gastric immune activity shifts CD4 populations toward a Th2 phenotype in some hosts, lowering the threshold for mast cell activation.
Direct IgE cross-reactivity
H. pylori-specific IgE titres are detectable in a subset of CSU patients and correlate with urticaria activity scoring.
Sharper questions. Better appointments.
The guide doesn't replace a clinician. It gives you the language, the labs, and the literature — so the visit is a clinical conversation, not a search.
-
Recognise the clinical signature of chronic spontaneous urticaria and how it differs from physical urticaria, vasculitis, and mast-cell activation syndrome.
-
Name the four pathways — anti-FcεRI, mimicry, Th2 skew, direct IgE — by which an unsuspected H. pylori infection has been associated with CSU.
-
Request the right secondary labs — anti-FcεRI, basophil activation test, thyroid antibodies, vitamin D — and read them in combination, not in isolation.
-
Decide between testing options — stool antigen, urea breath test, biopsy — based on cost, accuracy, and your specific clinical context.
-
Bring a structured conversation to your physician — three concrete questions that route the workup toward the gastric pathway without overstating the case.
Three tiers. One rubric. No exceptions.
Every claim in this guide is tagged with one of three evidence tiers. The summary below previews the four claims central to the case for investigating H. pylori in chronic spontaneous urticaria. The full reference list — eleven citations — sits at the back of the PDF.
Chronic hives · evidence summary
A few honest questions.
Is this medical advice?
No. It is an investigation guide — written to inform the conversation with a clinician. Diagnosis and treatment decisions belong to your physician.
Do I need to buy the testing kit?
No. The guide is content, sold separately from any Welyon product. It covers all three standard testing options — stool antigen, urea breath test, biopsy — and tells you what each costs and how to ask for it through your existing physician or insurer.
What if my labs are 'in range'?
The guide spends a section on this exact situation — what 'in range' obscures, what to look at in combination, and the secondary markers that frequently shift the picture without changing the headline numbers.
Refund policy?
14 days, no questions. If the guide isn't useful, the Lemon Squeezy receipt has a one-click refund link. We track this to keep the guides accountable.
Who wrote it?
The investigation series is authored by Welyon's editorial team and is being reviewed by the scientific advisory board currently in formation. Reviewer names will appear in the front matter of each guide upon confirmation.
Treat the hives as a question. Investigate the cause.
32 pages, eleven citations, four pathways, one clear path to a sharper appointment. PDF, instant download.
FDA disclaimer · Commercial interest
These statements have not been evaluated by the Food and Drug Administration. This guide is for informational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Consult your physician before acting on any information presented here.
Commercial interest disclosure. Welyon produces an at-home H. pylori testing kit and a physician-supervised Foundation Protocol referenced in this guide. The presence of these products is disclosed throughout — including on this page, the guide cover, and in the front matter of the PDF — and does not change the content of the guide. The investigation steps described would apply equally if neither product existed.
Editorial independence. Evidence grading in this guide follows the same three-tier rubric used across the H. Pylori Investigation Series, applied identically regardless of whether the resulting investigation routes a reader toward — or away from — Welyon's products.