We are all no strangers to skin diseases, and many people’s lives are in chaos due to suffering from hives. Urticaria is usually caused by skin allergies, and this is called allergic urticaria. Many people do not understand the disease and thus do not pay attention to the causes, resulting in the disease always recurring and extremely harmful. So, what are the causes of allergic urticaria? Causes of allergic urticaria 1, food factors allergy Food is a common cause of allergic urticaria, and foods with allergic properties in addition to our familiar fish, shrimp, eggs, milk, usually include strawberries, cocoa, tomatoes, and food coloring, flavoring, preservatives, natural or synthetic substances in food. So in daily life to seafood and other allergic foods or seasoning bottles should be used with caution. 2, environmental substances allergies Oral and nasal inhalation of environmental substances in daily life is also an allergen of allergic urticaria, including pollen, dust, animal dander, smoke, feathers, fungal spores inhalation, volatile chemicals (such as formaldehyde, acrolein, pyrethrum, cosmetics, etc.) and other airborne allergenic substances. 3, contact with allergic substances mainly refers to contact with animals and plants with allergic characteristics, including insect bites, poisonous hair sting (such as caterpillars, beetles and moths with hair scales stinging into the skin) and contact with nettles, wool, etc. Through the above introduction, you should understand the causes of allergic urticaria, I hope it can help you. Since allergic urticaria has very many allergens, it is recommended that you pay attention to early prevention. If you find any symptoms of allergic urticaria, you should pay attention to early treatment.