How is urticaria caused?

Written by Huang Ling Juan
Dermatology
Updated on September 04, 2024
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There are many causes of hives, and the most common is related to genetics. If one of the parents has an allergic constitution, then the likelihood of allergies in their offspring significantly increases. Environmental factors also play a role in the occurrence of hives. For example, environments with a lot of dust or dust mites can trigger allergic reactions. Additionally, a humid living environment can promote the growth of fungi, which can also cause hives. The occurrence of hives is also related to food. Individuals who are allergic to proteins might experience hives when consuming high-protein foods like fish, shrimp, crabs, milk, and eggs. Furthermore, viral infections, bacterial infections, and parasite infections can also trigger hives.

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Written by Zhu Zhu
Dermatology
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Difference between Flat Warts and Hives

Flat warts and hives are two different diseases with significant differences. First, the causes of these diseases are different. Flat warts are caused by human papillomavirus infection, while hives are related to allergies, usually caused by exposure to an allergen, and the specific cause needs to be determined through testing, with many cases having an unknown cause. Secondly, their treatment methods are also different; flat warts are often treated with lasers, cryotherapy, antivirals, etc., while hives are commonly treated with anti-allergy methods.

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Written by Zhang Jing
Dermatology Department
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Is there a difference between measles and urticaria?

Measles and hives are two completely different skin diseases. In terms of etiology, measles is caused by a viral infection, while hives are an allergic skin disease. Clinically, measles presents with diffuse red rash all over the body, accompanied by high fever and mucous membrane catarrhal symptoms, such as red eyes, excessive eye discharge, and so on. On the other hand, hives present with wheal-like skin lesions. Wheals refer to pale red or skin-colored raised lesions that can vary in shape and are usually quite large. They typically develop very rapidly and then subside within a few hours, with most wheals disappearing within 24 hours. Hives are also usually accompanied by severe itching.

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Written by Zhu Zhu
Dermatology
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Is acute urticaria contagious?

Acute urticaria is not contagious. Clinically referred to as wheals, acute urticaria is an allergic reaction-related disease associated with the immune system. Its causes may be related to allergies, microbial infections, stimuli from extreme temperatures, psychogenetic factors, endocrine factors, etc. Acute urticaria is not infectious but is curable and can recur. After contracting acute urticaria, it is crucial to actively identify the triggering factors to timely prevent the recurrence of urticaria.

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Written by Zhu Zhu
Dermatology
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Is urticaria contagious?

Urticaria is not contagious. Urticaria is often associated with multiple factors such as infections, food and drug allergies, insect bites, and also related to genetics, climate, and environment. If urticaria occurs, it is advisable to promptly identify the allergen and avoid further contact with it to prevent the occurrence of urticaria. Urticaria is not infectious, but it is curable and recurrent.

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Written by Xie Ming Feng
Dermatology
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What medicine is used for urticaria?

Urticaria primarily uses second-generation antihistamines as the first choice, and topical treatments that soothe and relieve itching can be used as appropriate. Traditional Chinese medicine often treats it with herbal decoctions based on syndrome differentiation, and specific medications should be used under the guidance of a doctor.