The cause of chest congestion in hives is edema of the respiratory tract. If urticaria involves the throat, bronchial tubes and other respiratory tracts, resulting in respiratory edema, hindering respiration, the body can not get enough oxygen supply, there will be chest congestion. Chest congestion should be sought as soon as possible to avoid life-threatening. If the laryngeal edema is severe enough to cause respiratory obstruction, tracheotomy should be performed in time to clear the airway. In addition to chest congestion, if there are symptoms of anaphylaxis such as panic, irritability and even lower blood pressure, or gastrointestinal symptoms such as nausea, vomiting, abdominal pain and diarrhea, it is necessary to consult a doctor as soon as possible for active treatment.