Zhang Bin, Department of Dermatology and Sexology, beijing ditan hospital: 1. Vascular edema is a special type of urticaria.

2, mostly sudden large-scale temporary edema, unclear edge, pale and reddish skin color, no itching or mild burning discomfort.

3. Disappear within a few hours (mostly within 24 hours).

4, prone to tissue looseness, such as eyelids, mouth, external genitalia, hands, feet, back;

5. If it occurs in the throat, laryngeal edema may occur, which is life-threatening;

6. The main treatment is antihistamine /H 1 receptor antagonist, such as cetirizine, mizolastine and chlorpheniramine. Patients with severe or laryngeal edema should be injected with glucocorticoid; Pay attention to finding allergens to avoid recurrence.