Allergic urticaria

Allergic urticaria is a type of allergic reaction caused by allergens. The allergen causes the body to produce specific antibody IgE (immunoglobulin E), ultimately leading to symptoms of urticaria. Allergic urticaria is mainly characterized by sudden itching of the skin, followed by the appearance of patches of bright red or pale wheals. The onset is rapid, quickly spreading over the entire body, and resolution is also relatively fast, with wheals subsiding within a few hours. However, as old wheals just disappear, new ones appear, occurring in succession and repeating multiple times a day. For urticaria with a clear cause, exposure to the cause should be avoided. For those with unknown causes, triggering factors should be minimized. During the episode, avoid seafood, beef, mutton, and other protein foods; quit smoking and alcohol; avoid strong tea, coffee, and other spicy or irritating foods; and use potentially allergenic drugs with caution. For those with positive allergen tests, desensitization therapy may be considered. Allergic urticaria is mainly due to allergens. Upon contact with an allergen, it flares up, with severe itching of the hands and feet, numbness of the limbs, difficulty breathing, and numbness of the head, followed by the appearance of soybean-sized vesicle-like rashes on the body. During an episode, taking medication will cause the symptoms to completely subside in about 3 hours, returning to normal with no visible trace afterward. The characteristic of allergic urticaria is the appearance of patchy wheals of varying sizes accompanied by intense itching. Many people know that urticaria is caused by allergic reasons. In fact, urticaria is also closely related to emotional stress. In addition to allergies to seafood and drugs, patients with allergic urticaria may also experience allergic reactions due to recent climate changes and respiratory tract infections, leading to skin urticaria, mainly manifested as red wheals on the skin in patches with itching.