Severe urticaria can be complicated by multi-system symptoms such as digestive system and respiratory system, manifested by nausea and vomiting, respiratory difficulties, etc., and may even produce systemic symptoms such as shock.
1. Digestive system symptoms: nausea, vomiting, abdominal pain and diarrhea can occur when the mucous membrane of gastrointestinal tract is involved.
2. Respiratory symptoms: severe urticaria can involve the larynx, bronchial tubes, respiratory difficulties, or even suffocation, which can be life-threatening.
3. Systemic symptoms: increased permeability of capillaries throughout the body, patients will experience shock symptoms, manifested as a drop in blood pressure, pallor, rapid pulse and so on.
When severe urticaria occurs, one should stay away from allergens immediately, and at the same time seek medical attention immediately to prevent life-threatening complications through professional means of intervention.