Forty-five dogs diagnosed with urticaria and treated at an animal hospital in Fukui-shi from June ₂₀₁₈ to January ₂₀₁₄ were analyzed. The following factors were included in the analysis: breed, sex, age, clinical symptoms, trigger factors, medical history, treatment, and progress. The incidence of the disease in the present study was ₀.₃% (₄₅/₁₄, ₃₁₂). French bulldogs showed the highest incidence of any breed at ₁.₃%. The incidence in females was ₂.₁ times higher than that in males, and the

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... dence in contraceptive females was ₂.₅ times higher than that in non-contraceptive females. The average age was ₅.₂ years. The incidence in younger age animals was higher than that in older age animals. Clinical symptoms, such as angioedema of the eyelids and lips, were observed in ₃₅ of ₄₅ dogs with urticaria. The trigger could not be identified in ₂₀ dogs (₄₄.₄%). In contrast, urticaria triggered by a change in side meal or staple food was identified in ₁₄ dogs (₃₁.₁%), and by a combination of vaccines, plants, and drugs . The medical histories included atopy and allergic dermatitis (n = ₁₈ : ₄₀.₀%), immune-mediated diseases (n = ₃ : ₆.₇%), and recurrent urticaria (n = ₅ : ₁₁.₁%). There were ₁₉ (₄₂.₂%) dogs without any relevant history.