In addition to skin rash, severe cases of acute urticaria can cause swelling of eyelids, lips, ears, and the face. In occasional cases, it can cause tightening of the airways and breathing difficulty.
急性蕁麻疹除了一般的皮疹外，嚴重的還會伴隨眼皮、嘴唇、耳朵或臉部腫脹，少數會出現呼吸道緊縮，造成呼吸困難。