BBC Learning English - 6 Minute English: Why do we itch?

Episode 260924 / 24 Sep 2026

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核心介绍

项目	内容
节目	6 Minute English
集数	Episode 260924
发布日期	24 Sep 2026
级别	Intermediate (中级)
主持人	Neil, Georgie
时长	约 6 分钟
主题	痒、抓挠、寄生虫、传染性行为、心理学

中文简介

本期节目探讨为什么我们会痒。Neil 和 Georgie 讨论痒的进化功能（清除寄生虫）、痒的传染性（看视频会痒）、以及相关词汇：itch/itchy、scratch、unpack、parasite、spontaneously、catch。附带听力小测验：刮胡子声 vs 手臂 vs 牛仔裤。

本周问题

Listen to the recording of scratching on the programme (at 1:38). What is being scratched?

听节目中的抓挠声（1:38 处）。是什么在被抓挠？

a) an arm (手臂)

b) a beard (胡子) ✅

c) some jeans (牛仔裤)

答案：b) a beard (胡子)。专家辨认为"hairy skin"，主持人确认为 beard scratch。

重点词汇表

单词/短语	英文释义	中文释义	来源语境
itch / itchy	unpleasant feeling on your skin / feeling something unpleasant on your skin	痒/痒的	核心话题
scratch	rub your nails back and forth against something, often to relieve an itch	抓挠；搔	动作
unpack	explain in clear detail	详细解释；剖析	Georgie 解释科学概念
parasite	animal, plant or fungus that lives on another lifeform and feeds on it	寄生虫	进化功能解释
spontaneously	without being asked; without thinking	自发地；不假思索地	传染性抓挠
catch (an illness/feeling)	get an illness or feeling from someone else	传染；被传染	痒的传染性

课文重点解析

1. 核心问题：Why do we itch? (为什么会痒？)

Neil: “An itch is that unpleasant feeling you get on your skin that you have to scratch with your fingers.”

Neil: “痒是皮肤上那种不舒服的感觉，让你非得用手指抓挠不可。”

2. 进化视角：痒是防御机制

Sonja Ständer: “By scratching the skin, we remove parasites or plants or anything that does not belong on the skin. And so, we start to scratch at the very same area where we itch and remove it. And it can no longer damage the skin and harm ourselves.”

Sonja Ständer: “抓挠皮肤能清除寄生虫或植物或任何不属于皮肤的东西。我们在痒的同一区域抓挠并清除它，这样它就无法再损害皮肤、伤害我们了。”

关键洞察：

✅ 痒是进化保留的保护机制
✅ 抓挠 = 清除 parasites (寄生虫)、植物、异物
✅ 痒的位置 = 需要清除的位置

3. 痒的传染性：心理学研究

Dr Henning Holle: “And what we found in this study was, yes, these scratching videos indeed made people feel itchier. They also started to scratch themselves more spontaneously. So, the answer is basically yes, you can catch a scratch.”

Henning Holle 博士: “研究发现：看抓挠视频确实让人更痒。人们也开始自发地更多抓挠。所以答案是肯定的，你能’传染’到抓挠。”

Georgie: “Catch in this context means get from someone else.”

Georgie: 这里的 catch 意思是从别人那里获得/被传染。

关键发现：

现象	解释
传染性痒	看别人抓挠 → 自己也痒
自发抓挠	spontaneously = 无意识、不假思索
社会传染	类似 catch a cold (感冒)、catch a yawn (打哈欠传染)

4. 测验答案揭晓

Sonja Ständer: “It sounds like hairy skin so I would go for the scalp.”

Anand Jagatia: “Yeah, I think it’s beard or something because it does sound like there’s hair there.”

Dr Henning Holle: “It is definitely hairy skin and Anand was spot on. So, it is indeed a beard scratch that we were listening to.”

Henning Holle 博士: “绝对是毛发生皮肤，Anand 说中了。确实是刮胡子/抓胡子的声音。”

批判性思考题

进化心理学视角：痒作为 “adaptive defense mechanism” (适应性防御机制)，如何解释 “phantom itch” (幻肢痒/无刺激痒)、“psychogenic pruritus” (心因性瘙痒)？是 “false alarm” (误报) 还是 “evolutionary mismatch” (进化错配)？
社会传染的神经基础：“contagious itch” (传染性痒) 与 “contagious yawning” (传染性打哈欠)、“emotional contagion” (情绪传染) 共享 “mirror neuron system” (镜像神经元系统)？fMRI 研究显示什么脑区激活？(insula, somatosensory cortex)
Scratch-Itch Cycle 的恶性循环：“itch-scratch cycle” (瘙痒-抓挠循环) 中，scratching → histamine release → more itch。慢性瘙痒患者如何用 “habit reversal training” (习惯逆转训练) 打破循环？
跨模态感官传染：audio-only scratching sounds 即可诱发痒感，说明 “cross-modal sensory integration” (跨模态感觉整合)。视觉、触觉、听觉哪个通道传染性最强？
语言中的 Catch 隐喻：catch a cold, catch a yawn, catch a scratch, catch feelings, catch the vibe。“catch” 从物理接触 → 抽象传播，体现 “conceptual metaphor: ACQUIRING IS CATCHING”。

完整对话记录

Transcript

Neil: Hello and welcome to 6 Minute English from BBC Learning English. I’m Neil.

Georgie: And I’m Georgie. Find the vocabulary, definitions and a free worksheet on our website, bbclearningenglish.com.

Neil: So, Georgie we’re going to talk about something a little different today. We’re talking about itching. Now an itch is that unpleasant feeling you get on your skin that you have to scratch with your fingers. What sort of things make you itch?

Georgie: Well, funny you should ask, because I’m actually wearing quite an itchy jumper at the moment and it’s making me want to scratch my skin. What about you?

Neil: Well, recently I was bitten by a mosquito and, as you know, when you get bitten by a mosquito, it’s really itchy. I had to scratch loads and loads.

Georgie: Oh, I hate it when that happens.

Neil: It was horrible. In this podcast, we’re going to hear from some experts about why we itch and how scratching can be good for us.

Georgie: And as usual, we’ll be learning some useful new vocabulary.

Neil: OK. Well, we’re going to start with a quiz question of course, Georgie. It’s a bit of a different one today. Dr Henning Holle studies the psychology of itching, and he played some scratching sounds to the guests on the BBC World Service programme CrowdScience. Now the question is, what is being scratched? You have three choices: a) an arm, b) a beard, or c) some jeans.

Georgie: OK. Well, let’s listen… Well, that sounded a bit hairy, so I’m going to go with b) a beard.

Neil: Well, we’ll find out at the end of the programme.

Georgie: So, Neil, I mentioned that my jumper was a bit itchy but sometimes I feel itchy for no particular reason. So, what’s going on there?

Neil: Well, that’s something that the listeners of BBC World Service programme CrowdScience also wondered. They wanted to know the answer to that. The presenter, Anand Jagatia, spoke to itching expert Sonja Ständer to find out more. Let’s listen.

Anand Jagatia: There’s lots of science to unpack here. Sonja, what actually is itchiness?

Sonja Ständer: Yeah. So, by scratching the skin, we remove parasites or plants or anything that does not belong on the skin. And so, we start to scratch at the very same area where we itch and remove it. And it can no longer damage the skin and harm ourselves.

Georgie: Anand says there’s a lot of science to unpack about itchiness. Unpack here means explain.

Neil: Sonja explains that when our skin feels itchy, we scratch it, and that helps to get rid of parasites and other harmful things on our skin. Parasites are animals or plants that live on another animal and feed from them.

Georgie: So, Neil, itching is our skin’s way of protecting itself against harmful parasites. And I have to say, all of this talk of itching and scratching is making me feel a bit itchy right now.

Neil: Well, that’s interesting because Dr Henning Holle wanted to study whether just thinking about itching makes us more likely to feel itchy.

Georgie: Henning and his team studied what happened when people watched videos of itching and scratching.

Neil: Let’s listen to him speaking to BBC World Service programme CrowdScience.

Dr Henning Holle: And what we found in this study was, yes, these scratching videos indeed made people feel itchier. They also started to scratch themselves more spontaneously. So, the answer is basically yes, you can catch a scratch.

Neil: In Henning’s study, when people watched videos of scratching, they scratched themselves spontaneously. If you do something spontaneously, you do it without being asked or without thinking.

Georgie: So, Henning concludes that yes, you can catch a scratch, just like you might catch an illness. Catch in this context means get from someone else.

Neil: OK. Georgie, I think it’s time for the answer to my quiz question. We had a clip of people scratching and you had to decide what is being scratched.

Georgie: I said that was a beard.

Neil: OK. Well, let’s see if the people who are listening to this on the programme CrowdScience agreed.

Sonja Ständer: It sounds like hairy skin so I would go for the scalp.

Anand Jagatia: Yeah, I think it’s beard or something because it does sound like there’s hair there.

Dr Henning Holle: It is definitely hairy skin and Anand was spot on. So, it is indeed a beard scratch that we were listening to.

Anand Jagatia: Wow!

Georgie: So I was right!

Neil: You were. Congratulations!

Georgie: OK. Let’s recap the vocabulary we learned in this programme, starting with itch, which is an unpleasant feeling on your skin. And something can be described using the adjective itchy.

Neil: When you feel an itch, you often scratch it with your fingers by rubbing your nails on the skin.

Georgie: If you unpack an idea or scientific concept, you explain it in clear detail.

Neil: A parasite is an animal or plant that lives on another animal and feeds on it.

Georgie: If you do something spontaneously, you do it without being asked or without thinking.

Neil: Catch can be used to mean get from someone else, such as an illness. For example, you can catch a cold.

Georgie: Once again, our six minutes are up, but you can test what you’ve learned with the worksheet on our website, bbclearningenglish.com.

Neil: Thank you for joining us and goodbye.

Georgie: Goodbye.

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核心话题卡片	🐜🦠🧠 图标组合，标题 “Why do we itch?” 可点击复制
词汇表	可折叠表格，6 个核心词汇，悬停显示例句，支持中英切换
Quiz 互动	音频片段播放：“What is being scratched?” 三选一，即时反馈
进化功能图解	动画：寄生虫落在皮肤 → 痒感 → 抓挠 → 寄生虫脱落 → 皮肤受保护
传染性痒实验可视化	视频观看 → 大脑镜像神经元激活 → 自发抓挠 → 行为模仿
Scratch-Itch Cycle 图解	循环图：痒 → 抓挠 → 组胺释放 → 更痒 → 更抓挠 → 打破循环策略
Catch 词族网络	中心 catch 辐射：cold/yawn/scratch/feelings/vibe/flights/dreams
关键概念图谱	节点：Parasite → Defense → Itch → Scratch → Contagion → Social Behavior
思考题区	可展开的问答卡片，适合教学/自测/讨论区
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