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- Dictionaryurticaria/ˌəːtɪˈkɛːrɪə/
noun
- 1. a rash of round, red welts on the skin that itch intensely, sometimes with dangerous swelling, caused by an allergic reaction, typically to specific foods.
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Sep 15, 2022 · Urticaria, or hives, are red, itchy welts that can appear on the skin due to allergies, infections, stress, or other factors. Learn about the types, diagnosis, and prevention of urticaria, and how to manage the symptoms with medication and lifestyle changes.
- Dermatographism
Dermatographism (also known as dermatographia) is a common,...
- Chronic Urticaria
Chronic urticaria is the medical term for long-term hives,...
- Dermatographism
Urticaria or hives as it is commonly called, is an itchy rash consisting of localised swellings of the skin that usually last for a few hours before fading away.
- What Is Urticaria?
- Classification of Urticaria
- Who Gets Urticaria and Why?
- What Are The Clinical Features of Urticaria?
- What Causes Urticaria?
- How Is Urticaria Diagnosed?
- What Is The Treatment For Urticaria?
- What Is The Differential Diagnosis of Urticaria?
- What Is The Outlook For Chronic Urticaria?
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Urticaria is characterised by very itchy weals (hives), with or without surrounding erythematous flares. The name urticaria is derived from the common European stinging nettle Urtica dioica. Urticaria can be acute or chronic, spontaneous or inducible. A weal (or wheal) is a superficial skin-coloured or pale skin swelling, usually surrounded by eryt...
Urticaria is classified according to its duration. 1. Acute urticaria(< 6 weeks duration, and often gone within hours to days) 2. Chronic urticaria(> 6 weeks duration, with daily or episodic weals) Chronic urticaria may be spontaneous or inducible. Both types may co-exist. Chronic inducible urticaria includes: 1. Dermographism 2. Cold urticaria 3. ...
One in five children or adults has an episode of acute urticariaduring their lifetime. It affects all races and both sexes. Acute urticaria can occur in newborns and infants but is uncommon. Acute urticaria in children is usually caused by infection, even if afebrile. In older children food, medication, and inhaled allergens are also important caus...
Urticarialweals can be a few millimetres or several centimetres in diameter, coloured white or red, with or without a red flare. Each weal may last a few minutes or several hours and may change shape. Weals may be round, or form rings, a map-like pattern, or giant patches. Urticaria can affect any site of the body and tends to be distributed widely...
Weals are due to release of chemical mediators from tissue mast cells and circulating basophils. These chemical mediators include histamine, platelet-activating factor and cytokines. The mediators activate sensory nerves and cause dilation of blood vessels and leakage of fluid into surrounding tissues. Bradykininrelease causes angioedema. Several h...
Urticaria is diagnosed in people with a history of weals that last less than 24 hours with or without angioedema. A medication and family history should be elicited. A thorough physical examination should be undertaken. Skin prick tests and radioallergosorbent tests (RAST) or CAP fluoroimmunoassay may be requested if a drug, latex, or food allergyi...
The main treatment of all forms of urticaria in adults and children is with an oral second-generation H1-antihistaminesuch as cetirizine or loratidine. If the standard dose (eg, 10 mg for cetirizine) is not effective, the dose can be increased up to fourfold (eg, 40 mg cetirizine daily). They are stopped when the acute urticaria has settled down. T...
PapularurticariaAcute urticaria resolves in hours to days but is often recurrent. Although chronic urticaria clears up in most cases, 15% continue to have wealing at least twice weekly after two years.
Urticaria is a skin condition characterised by itchy weals (hives) and angioedema. Learn about the causes, types, diagnosis, treatment and outlook of urticaria.
Hives, or urticaria, is a raised, itchy rash that can result from allergens, physical triggers, or underlying health conditions. Learn about the symptoms, pictures, and treatments of hives, and when to seek medical help.
- Hives are not contagious. However, if they occur due to an underlying infection, that infection could be contagious.
- Yes, stress can cause hives in some people. The reason for this is that stress causes a release of adrenalin, which can be a trigger for hives. Man...
- Hives are a kind of rash. Doctors tell them apart from other types of rash based on the symptoms. Hives are raised bumps or areas of skin that appe...
Urticaria or hives as it is commonly called, is an itchy rash consisting of localized swellings of the skin that usually last for a few hours before fading away. Urticaria results from changes in the small blood vessels of the skin. Such changes are brought about by the release of substances in the body, the commonest of which is histamine.
Apr 25, 2023 · Chronic hives, also called urticaria, are itchy welts that last for more than six weeks and return often. Learn about the possible triggers, complications and treatments of this skin condition.
Urticaria is a skin condition characterized by raised, itchy, red plaques (wheals or hives) caused by histamine release from mast cells and basophils. It can be acute or chronic, and triggered by various factors such as allergens, infections, medications, or stress.
