There is no significant difference between urticaria and angioedema in children and adults in many aspects, and even if there is a difference, it is sometimes not very obvious, but if you look closely you can still find direct differences between the two. First of all, most urticaria in children is acute, the symptoms are more obvious, and the rash is widely distributed, but it often comes and goes, and the illness is abruptly discontinued. In adults, chronic urticaria is more common, with flare-ups and stoppages that last for years. In children, many urticaria are caused by allergic reactions, especially food allergies that cause urticaria far more often than in adults (about 40% of children and only 1.4% of adults). The common causes of urticaria in infants and children are milk and eggs. About 2-3% of infants also have allergic reactions to the protein component of breast milk. Therefore, breastfeeding mothers should pay more attention to their daily living and eating habits. In addition to milk and eggs, common allergic foods for young children include fish, crab, shrimp, peanuts, other dried nuts, celery, carrots, cinnamon, white pepper, and mustard. These foods can cause not only urticaria, but also allergic eczema and asthma aggravation. 10% of urticaria and asthma in children over 5 years old are caused by fish and 5% by eggs. There is also a clear relationship between cooking methods and allergic reactions. Raw celery can often trigger allergic reactions, but when cooked, its chances of causing allergic reactions are greatly reduced, as is the case with milk. Children aged 2-7 years are the most intolerant to insect bites and are prone to papular urticaria, and in addition to immediate local reactions to insect bites, they are also prone to delayed systemic reactions. Children are also prone to allergic contact urticaria. Penicillin allergy is significantly more common in adolescents than in children and the elderly. The most common type of physical urticaria in children is scarring, which is significantly shorter in duration than in adults. In children, scarring usually lasts only 2 to 4 weeks, whereas in older children it can last for months or even years. Cold urticaria is more common in adolescents, more females than males, and the onset of cold urticaria is associated with a history of infectious mononucleosis, measles, or herpes simplex virus infection prior to the onset of the disease. Cholinergic urticaria and solar urticaria are mainly seen in adults and adults, but are rare in children. However, water urticaria (i.e., a sensation of wind or itchiness after contact with water) is a rare type of urticaria that occurs mainly in older children and adolescents.
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