北美不用碘伏涂在表皮伤口处是有道理的。

查了ChatGPT：

 

对于表皮割破，用水（或生理盐水）清洁伤口是适当的，而且往往是首选，而不是常规使用碘。

 

碘有杀菌的功效，但也对参与愈合的健康细胞有一定的风险。临床证据并没有清楚地表明碘比清水更能改善单纯伤口的治疗效果。

 

在某些情况下（例如，较深的伤口、手术环境、高感染风险的伤口），可能需要明智地使用杀菌剂（包括低浓度碘），但这是另一种情况。

 

• 切伤了手指（图删了）

谢谢乡亲们昨天对我割伤手指的关心和安慰！：））

 

 

Bottom line

• Your doctor’s approach is evidence-aligned: for superficial lacerations, using water (or saline) to clean the wound is appropriate and often preferred, rather than routinely using iodine.
• Iodine has antiseptic benefits, but also some risks to the healthy cells involved in healing. The clinical evidence does not clearly show that iodine improves outcomes for simple wounds over clean water.。
• In some situations (e.g. deeper wounds, surgical settings, high-infection-risk wounds), judicious use of antiseptics (including low-concentration iodine) may be warranted — but that’s a different context.