皮膚敏感症狀1,2
蕁麻疹
俗稱風癩，是一種突發性皮膚過敏反應。皮膚會呈淡紅色。蕁麻疹可引致痕癢或刺痛。疹狀大小不一，可以在身體任何部位出現，甚至可能會相連成紅腫的片狀，輕則持續數小時，重則數天後方會消退。
蕁麻疹的成因3,5
蕁麻疹乃皮膚中的肥大細胞釋放組織胺和其他化學物質所致，誘因眾多。
患者可透過不同測試找出致病原因，惟真正成因一般難以確認。
常見誘因：
對食物、藥物或動物出現過敏反應
食物內的化學物質
運動
蟲咬
皮膚受擠壓
陽光照射
治療4
確定及避開誘因乃最佳治療，惟難以找出誘因。
治敏速可有效紓緩痕癢及皮疹，患者需要在蕁麻疹消退前持續服用6。
參考資料：
- Hives: Overview. American Academy of Dermatology. Available at: https://www.aad.org/public/diseases/a-z/hives-overview. Last accessed 21 Feb 2020.
- Hives: Signs and Symptoms. American Academy of Dermatology. Available at: https://www.aad.org/public/diseases/a-z/hives-symptoms. Last accessed 21 Feb 2020.
- Hives: Causes. American Academy of Dermatology. Available at: https://www.aad.org/public/diseases/a-z/hives-causes. Last accessed 21 Feb 2020.
- Hives: Diagnosis and Treatment. American Academy of Dermatology. Available at: https://www.aad.org/public/diseases/a-z/hives-treatment. Last accessed 21 Feb 2020.
- Mastocytosis: What It Is and How It's Diagnosed and Treated. American Family Physician. Available at: https://www.aafp.org/afp/1999/0601/p3059.html. Last accessed 21 Feb 2020.
- Zyrtec Hong Kong prescribing information, HK082018 (NCDS05/eMC20180628)