What causes urticaria in children?

Sep 03, 2024 Source: Cainiu Health

Dr. Liu Wenmin

Introduction

Pediatric urticaria, commonly known as hives, is a common allergic skin disorder characterized by dilation and increased permeability of small blood vessels in the skin and mucous membranes. Pediatric urticaria is mainly triggered by factors such as emotional stress, changes in temperature, food allergies, drug allergies, and viral infections. It is important to maintain a regular daily routine and lifestyle for affected children, avoiding excessive fatigue and emotional fluctuations.

Generally, pediatric urticaria is an allergic skin condition caused by dilation and increased permeability of small blood vessels in the mucous membranes. It is mainly triggered by factors such as emotional stress, changes in temperature, food allergies, drug allergies, and viral infections. If any discomfort occurs, timely medical consultation is recommended. The specific analysis is as follows:

1. Emotional Stress

Emotional stress can prompt the nervous system to release inflammatory chemical mediators such as histamine and 5-hydroxytryptamine, leading to blood vessel dilation and potentially causing pediatric urticaria. It is important to maintain a regular daily routine and lifestyle for affected children, avoiding excessive fatigue and emotional fluctuations to reduce both the frequency and severity of urticaria episodes.

2. Cold or Hot Weather

When the body is exposed to cold or high temperatures, the skin and mucous membranes may be stimulated by extreme temperatures, potentially triggering mast cells to release inflammatory mediators such as histamine. These substances cause capillary dilation and increased permeability, resulting in localized swelling, itching, and ultimately inducing pediatric urticaria. During weather changes involving extreme temperatures, children should avoid prolonged exposure to such environments to minimize skin irritation.

3. Food Allergy

Food allergy is an abnormal or excessive immune response triggered by food proteins. When a child ingests a previously sensitizing food, IgE antibodies bind to allergens in the food, prompting the release of histamine, which acts on blood vessels to increase their dilation and permeability. This leads to leakage of large amounts of protein and fluid into skin tissues, causing pediatric urticaria. Additional symptoms may include itchy eyes and arrhythmia. Treatment should follow medical advice and may include antihistamines such as cetirizine hydrochloride tablets, loratadine tablets, and prednisone acetate tablets.

4. Drug Allergy

Drug allergy refers to abnormal immune reactions affecting multiple organs and tissues in response to certain medications. Some drugs may be highly irritating, directly damaging the skin and mucous membranes and thereby triggering pediatric urticaria. Symptoms such as vomiting and diarrhea may also occur. Under professional medical guidance, medications such as pediatric paracetamol-phenyl ephedrine tablets, epinastine hydrochloride tablets, and tranilast capsules may be used for treatment.

5. Viral Infection

Viral infection occurs when various viruses invade the body and replicate within target organ cells, interacting with the host's systems. Upon viral invasion, the immune system recognizes and attacks the virus, producing immune complexes or inflammatory mediators that cause skin vessel dilation and increased permeability, thus triggering pediatric urticaria. Associated symptoms may include fever and headache. Treatment under medical supervision may include prednisone acetate tablets, mizolastine, and skin-itching granules.

In daily life, it is important to maintain a light, nutritionally balanced diet, regular作息 (sleep-wake cycles), moderate exercise, and enhanced immunity.

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Is urticaria contagious?

In general, urticaria is not contagious. If you experience any discomfort, seek medical attention promptly. In daily life, patients with urticaria should promptly identify and avoid potential allergens, refrain from scratching the skin to prevent symptom exacerbation, follow prescribed treatment regimens strictly to reduce recurrence, and also avoid common allergens while maintaining a healthy sleep schedule and proper skin care.

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How is urticaria contracted?

In most cases, urticaria may be triggered by exposure to cold air, irritation from close-fitting clothing, viral upper respiratory infections, chronic gastritis, or chronic tonsillitis. Patients may adjust their lifestyle habits or adopt symptom-targeted treatments based on their individual circumstances. In daily life, it is advisable to avoid known allergen-exposure scenarios whenever possible and maintain a regular sleep-wake schedule to support immune system stability.

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What medication works best and fastest for hives?

In general, there is no such thing as “the best and fastest-acting medication for urticaria.” After developing urticaria, patients may take medications—including loratadine tablets, cetirizine hydrochloride tablets, ebastine tablets, desloratadine tablets, or chlorpheniramine maleate tablets—under a physician’s guidance. Patients should also avoid exposure to pollen, dust mites, and irritating foods.

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Will urticaria resolve on its own without treatment?

In most cases, urticaria resolves spontaneously; however, the prognosis depends on the individual’s specific circumstances, and not all cases will improve without intervention. If symptoms persist or worsen, prompt medical consultation is recommended. Avoid exposure to known allergens, cleanse the skin with lukewarm water, refrain from vigorous scratching, wear loose-fitting, soft clothing, and minimize friction and irritation to the skin.