Severe urticaria in pregnant women in late pregnancy may be related to contact with allergens, and the treatment needs to remove the causes, emergency treatment, and so on. 1. Remove the causes: exogenous causes mainly include physical stimuli, food, drugs, plants, sports, etc.. Endogenous stimuli mainly include hidden infections, fatigue, mental stress, etc. It is necessary to remove the triggering factors in time to avoid exacerbation of urticaria. 2. Emergency treatment: If urticaria with laryngeal edema, anaphylactic shock, need to go to the hospital in time, need to quickly give oxygen treatment, keep the airway open, if necessary, also need to establish a venous channel and other treatment measures. In addition, there are some urticaria patients can not find the cause, it is recommended that the late pregnant women with urticaria go to the regular hospital in time, under the guidance of the doctor, to find the cause of the disease, symptomatic treatment.