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Related Experiment Videos

Clinical observations on delayed pressure urticaria.

R P Warin1

  • 1Department of Dermatology, Bristol Royal Infirmary, U.K.

The British Journal of Dermatology
|August 1, 1989
PubMed
Summary
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Delayed pressure urticaria (DPU) patients exhibit variable responses to pressure testing. Delayed dermographism in DPU patients correlates with pressure test results, suggesting it

Area of Science:

  • Dermatology
  • Immunology

Background:

  • Delayed pressure urticaria (DPU) is a chronic condition characterized by hives and swelling.
  • DPU patients often have a history of chronic urticaria or angio-oedema.

Purpose of the Study:

  • To investigate the variability in pressure test responses in DPU patients.
  • To explore the relationship between delayed pressure urticaria and delayed dermographism.

Main Methods:

  • Repeated pressure tests were conducted on 48 patients diagnosed with DPU.
  • Pressure tests were also performed on seven patients with chronic urticaria exhibiting Köbner weals.
  • Delayed dermographism was assessed in eight DPU patients.

Main Results:

  • DPU patient responses to pressure testing varied significantly, lasting from days to years.

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  • Seven patients with chronic urticaria and Köbner weals were likely experiencing short-term DPU.
  • A strong correlation was observed between positive pressure tests and delayed dermographism in DPU patients.

    • Conclusions:

    • Delayed pressure urticaria presents with highly variable response durations.
    • Delayed dermographism appears to be a manifestation of DPU induced by a different pressure application.
    • These findings highlight the complex nature of pressure-induced urticaria.