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 causes. In adults urticaria is usually idiopathic and spontaneous. Acute urticaria with fever can be the first sign of COVID ...

Psychotherapy is reported to benefit some patients with chronic urticaria. Avoidance of trigger factors. In addition to antihistamines, the cause of urticaria should be eliminated if known (eg drug or food allergy). Avoidance of relevant type 1 (IgE …

Spontaneous or 'ordinary' urticaria is divided into acute urticaria (lasting a few hours or days or up to six weeks) and chronic urticaria (persisting more than six weeks, and sometimes life-long). Acute urticaria is self-limiting and often related to infection , and less often due to …

The natural history of chronic spontaneous urticaria in children and adults is the same, with the chance of remission within three years being 30-50% and after five years 40-70%. Chronic inducible urticaria seems to be more persistent, particularly cold urticaria and solar urticaria.

2024年9月9日 · What causes chronic inducible urticaria? Urticaria is a mast cell-driven disease.Activated mast cells release histamine along with other mediators, such as platelet-activating factor and cytokines, resulting in sensory nerve activation, vasodilation, plasma extravasation, and recruitment of cells to the urticarial lesion.

2018年5月15日 · Disease activity in chronic spontaneous urticaria can be assessed with the 7-day Urticaria Activity Score (UAS7), a simple, validated scoring system based on the assessment of key urticaria signs and symptoms — weals and pruritus — that are documented by the patient. The daily weal and pruritus scores are added up for 7 days; the maximum ...

2019年3月11日 · The clinical features of heat urticaria are usually confined to the area affected by the heat stimulus. There are three clinical subtypes of heat urticaria. Immediate localised heat urticaria. Immediate localised heat urticaria is the most common type and presents as large, well-circumscribed, itchy weals.

Physical urticaria. Physical urticaria accounts for 50% of cases of urticaria and may coexist with idiopathic chronic urticaria. Physical urticaria results in localised short-lasting weals (less than one hour). Physical urticaria may be due to: Light touch (dermographism) Pressure, heat; Cold; Sweat (cholinergic) Water (aquagenic) Sunlight (solar)

Contact urticaria is caused by a variety of compounds, such as foods, preservatives, fragrances, plant and animal products, metals, and rubber latex. The mechanism by which these provoke an immediate urticarial rash at the area of contact can be divided into two categories: non-immunological contact urticaria and immunological (allergic ...

2019年4月4日 · Urticaria is characterised by individual weals resolving or changing within 24 hours. The child should be thoroughly examined to detect possible causes. If a food or drug allergy is suspected, a skin prick test or immunoglobulin E (IgE) tests may occasionally be arranged to investigate further.