Her Whole Body Was Itchy: What She Thought Was a Common Allergy Was Hiding Something More Serious

Hives — medically known as urticaria — are raised, red, intensely itchy welts that appear suddenly on the skin. They can be:

  • As small as a pencil eraser
  • Or grow into large, swollen patches
  • They often change shape, move around the body, and disappear and reappear within hours

While hives are sometimes triggered by allergies to food, medication, or insect bites, they can also be caused by:

  • Stress
  • Infections
  • Temperature changes (hot showers, cold air)
  • Autoimmune reactions
  • Hormonal fluctuations
  • Chronic illness

And in up to 50% of chronic cases, the cause remains unknown.


How Hives Are Different From a Simple Allergy

Reaction to a known trigger (e.g., peanuts, pollen)
Can appear without a clear cause
Symptoms subside once the allergen is removed
May last for weeks or months
Usually localized
Often spreads across the body
Resolves quickly with antihistamines
May require long-term management

In this woman’s case, there was no clear allergen — no new soap, no shellfish, no bee sting.
Her immune system was overreacting for reasons even her doctors couldn’t immediately pinpoint.

Recognizing the Signs of Hives

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