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Stages of progression in contact urticaria[6]
| Stage | Description |
|---|---|
| 1 | Localized reaction (redness and swelling) with nonspecific symptoms (burning, itching, tingling) |
| 2 | Generalized reaction |
| 3 | Extracutaneous symptoms (rhinoconjunctivitis, orolaryngeal and gastrointestinal dysfuntion) |
| 4 | Anaphylactic shock |
