生蛇通常始于皮肤出现异常感觉，例如在即将出现红疹的部位感到疼痛、瘙痒、发痒或刺痛。1,2 这些感觉可能在红疹显现的至少1至2天前开始出现。3 有些人在红疹出现前，也可能出现发烧、头痛、发冷、疲倦和胃部不适等症状。1-3
生蛇的红疹多以红斑形式出现，并迅速发展为充满液体的水疱。3,4这些水疱会在7至10天内结痂，红疹通常会在2至4周内消退。2,3
参考资料:
1. World Health Organization. Shingles (herpes zoster). Available at: https://www.who.int/news-room/fact-sheets/detail/shingles-(herpes-zoster). Accessed 17 September 2025.
2. Centers for Disease Control and Prevention. Shingles symptoms and complications. Available at: https://www.cdc.gov/shingles/signs-symptoms/index.html. Accessed 17 September 2025.
3. American Academy of Dermatology Association. Shingles: Signs and symptoms. Available at: https://www.aad.org/public/diseases/a-z/shingles-symptoms. Accessed 26 September 2025.
4. Health Hub. Herpes zoster (shingles). Available at: https://www.healthhub.sg/health-conditions/herpes_zoster. Accessed 21 November 2025.
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