About this condition
Urticaria, also called hives, causes raised itchy wheals that often change shape or location. Many episodes are not caused by a specific food, and the pattern of symptoms is essential when considering triggers.
What you should know
Wheals appear because of changes in the skin’s small blood vessels and can come and go. A single wheal often disappears within a day, although new ones may develop elsewhere. Persistent or recurrent episodes deserve tailored assessment.
When to seek medical advice
Typical symptoms are transient raised patches, itching and repeated outbreaks. The clinician asks about timing, medicines, recent infections and physical triggers, and whether swelling occurs around lips or other areas.
Important distinctions
Urticaria is different from a fixed rash, contact dermatitis or a severe blistering reaction. It should not automatically be labelled food allergy; a broad allergy panel is often unhelpful without a clear history of exposure and reproducible symptoms.
How assessment works
Diagnosis often relies on examination and the behaviour of the wheals. Limited, targeted tests may be useful when the history suggests a specific cause or chronic condition, but extensive routine investigations are not mandatory for every patient.
Management and limitations
Depending on severity and duration, a clinician may recommend antihistamine treatment and a follow-up plan. Unnecessary restrictive diets and repeated unsupervised steroid courses are not universal solutions. Symptoms persisting or recurring should be reviewed.
When emergency help is needed
Hives with a swollen tongue or throat, hoarse voice, wheezing, marked weakness or fainting may signal anaphylaxis. Call 103 or 112 immediately; do not wait for a routine skin or allergy appointment.
Related information
Signs and symptoms
Typical symptoms are transient raised patches, itching and repeated outbreaks. The clinician asks about timing, medicines, recent infections and physical triggers, and whether swelling occurs around lips or other areas.
Diagnosis and tests
Diagnosis often relies on examination and the behaviour of the wheals. Limited, targeted tests may be useful when the history suggests a specific cause or chronic condition, but extensive routine investigations are not mandatory for every patient.
Care and treatment approaches
Depending on severity and duration, a clinician may recommend antihistamine treatment and a follow-up plan. Unnecessary restrictive diets and repeated unsupervised steroid courses are not universal solutions. Symptoms persisting or recurring should be reviewed.
When to seek urgent care
Hives with a swollen tongue or throat, hoarse voice, wheezing, marked weakness or fainting may signal anaphylaxis. Call 103 or 112 immediately; do not wait for a routine skin or allergy appointment.
Frequently asked questions
Are all hives caused by food?
No. Infections, medicines and physical factors can also be involved, and a specific cause is not always identified.
Does everyone with hives need allergy testing?
No. Testing is based on the pattern and clinical history; broad panels are often not useful for chronic spontaneous urticaria.
When is urticaria dangerous?
Seek emergency help if it comes with breathing difficulty, rapid throat swelling, collapse or other signs of a serious systemic reaction.
Important information
A medical consultation is needed for diagnosis and treatment recommendations.
Self-treatment can be harmful to your health.
