For most people with chronic urticaria, the cause is unknown.

The cause of chronic urticaria is often more difficult to identify.

Chronic urticaria has been seen in a few cases of CD.

Physicians can rarely determine any particular cause of disease for chronic urticaria.

Regular allergy testing for people with chronic urticaria is not recommended.

Chronic urticaria and angioedema: Hives lasting more than six weeks.

Chronic urticaria can be difficult to treat.

No evidence shows regular allergy testing results in identification of a problem or relief for people with chronic urticaria.

Chronic urticaria (hives lasting longer than six weeks) is rarely due to an allergy.

Chronic urticaria: what diagnostic evaluation is best?

Article: Effect of antihistamine up-dosing in chronic urticaria.

Acute and chronic urticaria are visually indistinguishable.

Cetirizine is also used to treat itching and swelling caused by chronic urticaria (hives).

- Chronic urticaria.

These cause chronic urticaria (nettle-rash) in some people, and urticaria is sometimes due to an allergic reaction.

Asthma, chronic rhinitis or chronic urticaria.

Chronic urticaria and angioedema can affect other internal organs such as the lungs, muscles, and gastrointestinal tract.

Idiopathic chronic urticaria

Fexofenadine is indicated for relief from physical symptoms associated with seasonal allergic rhinitis and for treatment of chronic urticaria.

Rupatadine fumarate has been approved for the treatment of allergic rhinitis and chronic urticaria in adults and children over 12 years.

Hydroxyzine can also be used for the treatment of allergic conditions, such as chronic urticaria, atopic or contact dermatoses, and histamine-mediated pruritus.

A survey indicated chronic urticaria lasted a year or more in more than 50% of sufferers and 20 years or more in 20% of them.

Recently, Melani et al. reported the case of a 20-year-old man with CMTC in association with chronic urticaria.

Zuberbier T. Pharmacologic rationale for the treatment of chronic urticaria with second generation non-sedating antihistamines at higher-than-standard doses.

Chronic urticaria is often accompanied by coexistent physical urticaria, triggered by environmental exposure to heat, cold, sunlight, vibration, pressure on the skin or even exercise.