What causes hives in kids
Pro Research Analysisby 
Searched over 200M research papers
Causes of Hives in Children
Introduction to Pediatric Urticaria
Urticaria, commonly known as hives, is a prevalent skin condition in children characterized by pruritic (itchy) and erythematous (red) wheals. It can be classified into acute and chronic forms based on the duration of the symptoms. Acute urticaria is more common in children, while chronic urticaria, defined as hives lasting more than six weeks, is relatively rare 12.
Common Triggers of Acute Urticaria in Children
Infections
Infections are the most frequently documented cause of acute urticaria in children, accounting for more than 40% of cases. Viral infections, in particular, are often identified as potential triggers and sometimes the main cause of acute urticaria . This is more prevalent in infants and young children compared to adults.
Medications
Certain medications can also trigger acute urticaria in children. Nonsteroidal anti-inflammatory drugs (NSAIDs) are notable for their role in aggravating chronic spontaneous urticaria, although their impact is less pronounced in acute cases .
Food Allergies
Food allergens are another common cause of acute urticaria in children. However, it is important to note that universal allergy testing for food allergens is not recommended for chronic urticaria, as it often leads to false positives and unnecessary dietary restrictions .
Chronic Urticaria in Children
Idiopathic Nature
Chronic urticaria in children is often idiopathic, meaning that no specific cause can be identified in most cases. The rate of identifying a specific cause varies from 20% to 50%, but in practice, most cases remain unexplained and are classified as chronic idiopathic urticaria .
Autoimmune Factors
Recent studies have shown that more than 30% of children with chronic urticaria may have chronic autoimmune urticaria. This form of urticaria is less common in children than in adults but still represents a significant subset of chronic cases .
Role of Vitamin D
There is ongoing research into the role of vitamin D in chronic urticaria. Some studies suggest that lower serum vitamin D levels may be associated with higher urticaria activity and longer duration of symptoms. However, the role of vitamin D in children with chronic urticaria remains controversial and unclear .
Conclusion
In summary, the causes of hives in children vary between acute and chronic forms. Acute urticaria is commonly triggered by infections, medications, and food allergens, while chronic urticaria is often idiopathic or autoimmune in nature. Understanding these triggers can help in managing and treating urticaria in pediatric patients effectively.
Sources and full results
Most relevant research papers on this topic