Postpartum urticaria is not contagious. The occurrence of urticaria is mainly an allergic reaction to various factors such as certain foods, medications, plants, or infections. Clinically, it mainly manifests as dilation and increased permeability of small blood vessels in the skin and mucosa, resulting in skin rashes and redness. However, this condition is related to a decrease in the body's immune strength, making postpartum urticaria more likely to occur after childbirth. Postpartum urticaria has a certain hereditary nature. When postpartum urticaria occurs, one should not scratch it to prevent breaking the skin and causing secondary infections. Avoid using irritating liquids for cleansing or hot water for washing. When itching occurs, topical antipruritic agents can be applied. It is advisable to eat fresh vegetables and fruits in daily life and avoid spicy and irritating foods.