Urticaria (Hives): a complete overview - DermNet
Vessel-wall damage indicates urticarial vasculitis. What is the treatment for urticaria? The main treatment of all forms of urticaria in adults and children is with an oral second-generation H1-antihistamine such as cetirizine or loratidine. If the standard dose (eg, 10 mg for cetirizine) is not effective, the dose can be increased up to ...
Acute urticaria: Causes, Features, and Treatment - DermNet
Vessel-wall damage indicates urticarial vasculitis. What is the treatment for acute urticaria? The main treatment for acute urticaria in adults and in children is with an oral second-generation antihistamine chosen from the list below. If the standard dose (eg 10 mg for cetirizine) is not effective, the dose can be increased fourfold (eg 40 mg ...
Urticaria and urticaria-like conditions - DermNet
Pruritic urticarial papules and plaques of pregnancy. PUPPP or Pruritic Urticarial Papules and Plaques of Pregnancy is an eruption occurring during the last few weeks of pregnancy, usually in a first pregnancy. Small pink papules may join to form plaques; Urticarial lesions are most common, but eczematous and blistered plaques may also arise
Chronic spontaneous urticaria - DermNet
2018年5月15日 · 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. Many different molecules can activate mast cells in urticaria, but generally, these are not well defined.
Chronic urticaria - DermNet
Vessel-wall damage indicates urticarial vasculitis. What is the treatment for chronic urticaria? Antihistamines. The main treatment for chronic urticaria in adults and children is with an oral second-generation H 1-antihistamines such as cetirizine or loratidine. If the standard dose (eg, 10 mg for cetirizine) is not effective, the dose can be ...
Contact urticaria - DermNet
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) contact urticaria. Non-immunological contact urticaria typically causes mild localised reactions that clear within hours, for example, stinging nettle rash.
Urticaria and angioedema images (hives) - DermNet
Images of urticaria, angioedema (hives). Authoritative facts about the skin from DermNet New Zealand.
Cold urticaria - DermNet
Cold urticaria can be diagnosed by applying an ice cube against the skin of the forearm for 1–5 minutes. A distinct red swollen rash should develop within minutes in the area exposed to the cold-stimulation test if a patient has cold urticaria. Complete blood counts and metabolic tests may also be performed to determine associated diseases.
Polymorphic eruption of pregnancy. PUPPP - DermNet
The rash usually starts in the stretch marks around the umbilicus where stretching of the abdomen is greatest. Triplet pregnancies have a higher risk (14%) than twin pregnancies (2.9%). Another theory considers low-level traffic of fetal cells within the mother's circulation, which appears increased in women with polymorphic eruption of ...
Aquagenic urticaria - DermNet
Water reacts with unknown components within the skin, causing histamine release from mast cells and the formation of an urticarial rash. Triggers may include: Still or running fresh water; Seawater; Sweat and tears. Aquagenic urticaria appears whatever the water temperature, saltiness, or pH, and is not dependent on psychogenic factors.