Is acute urticaria contagious?

Written by Zhu Zhu

Dermatology

Updated on September 26, 2024

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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 Li Ya Ping

Dermatology Department

1min 9sec

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Can urticaria be contagious?

Urticaria is not contagious. Urticaria, also known as wheals or commonly referred to as hives, is caused by temporary increased vascular permeability in the skin and mucous membranes due to allergic factors, resulting in localized edema. Wheals generally subside quite quickly, typically within 24 hours. The causes of wheals, which are essentially urticaria, may include the food we eat, airborne inhalants, and skin contact with substances such as pollen, dust mites, mold mites, as well as animal dander, fur, etc. Additionally, some cases may be related to infections, and some people may have a lethal factor due to suspicious medications. Moreover, the occurrence of urticaria can also be related to other factors such as cold, heat, ultraviolet light, and mechanical stresses such as friction or pressure. Furthermore, other factors including psychological and endocrine factors can also lead to the occurrence of urticaria.

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Written by Qu Jing

Dermatology

1min 21sec

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How to Distinguish Between Papular Urticaria and Urticaria

Papular urticaria, also known as insect bite dermatitis, is a different disease from urticaria. Urticaria, also known as wheals, is called yinzhen in traditional Chinese medicine, and it is a localized edema of the skin and mucous membranes due to temporary increased vascular permeability. For most patients with urticaria, the exact cause cannot be identified. Common causes include foods, such as animal proteins and certain food additives that induce urticaria. Urticaria can also be triggered by certain infections as allergens, as well as by certain medications such as penicillin, serum products, various vaccines, sulfonamides, etc. Additionally, common inhalants such as pollen, animal dander, dust, fungal spores, dust mites, and volatile chemicals can also trigger urticaria. Papular urticaria is characterized by a small blister in the center of a reddish area, often resulting from bites or stings of various insects like mosquitoes, mites, bees, etc., or from irritation by toxic sap on the skin. Improvement can be seen once removed from the allergenic environment.

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Written by Zhu Zhu

Dermatology

37sec

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Urticaria should be seen in which department?

Once urticaria occurs, it is advised to promptly consult a dermatologist, as urticaria is a type of skin disease related to allergies and belongs to the field of dermatology. Urticaria causes many symptoms, such as wheals, erythema, and papules on the skin, accompanied by severe itching. Therefore, it is essential to treat the symptoms in a timely manner. First, identify the allergen and avoid further contact with it. Moreover, use some anti-allergy medications for treatment and generally enhance your own resistance.

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Written by Zhang Jing

Dermatology Department

50sec

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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 Du Rui Xia

Obstetrics

47sec

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Symptoms of postpartum urticaria

Postpartum hives are mainly characterized by subjective itching symptoms on the skin. On the surface of the skin, you can see patches of varying sizes with a reddish color, some of which may also feel burning. Generally, this can occur within the first few hours and then quickly subside, but it is prone to recurrent outbreaks. Additionally, some patients may experience gastrointestinal reactions, such as nausea, vomiting, abdominal pain, diarrhea, and can even cause palpitations and difficulty breathing. When hives are detected, it is advisable to go to the hospital in a timely manner, and ask professional doctors to actively carry out examinations and treatments.