# Why does scratching an itch feel so good?
**URL:** https://boards.straightdope.com/t/why-does-scratching-an-itch-feel-so-good/1031749
**Category:** Factual Questions
**Created:** [July 17, 2026, 5:04pm UTC](https://boards.straightdope.com/t/why-does-scratching-an-itch-feel-so-good/1031749 "2026-07-17T17:04:52Z")
**Posts on this page:** 12
**Page:** 1
### Author:  [@StarvingButStrong](https://boards.straightdope.com/u/StarvingButStrong)
#### Post date: [July 17, 2026, 5:04pm UTC](https://boards.straightdope.com/t/why-does-scratching-an-itch-feel-so-good/1031749/1 "2026-07-17T17:04:52Z")
I’m not talking about a casual brushing something off your skin, or pulling off a bit a dried skin. I mean when the urge to scratch goes on and on, to the point you are actually damaging your skin, sometimes drawing blood … and you still feel that scratching actually feels BETTER than not tearing at an actual wound? It seems like an utterly stupid thing for your nervous system to drive you to do.
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### Author:  [@PastTense](https://boards.straightdope.com/u/PastTense)
#### Post date: [July 18, 2026, 12:40am UTC](https://boards.straightdope.com/t/why-does-scratching-an-itch-feel-so-good/1031749/2 "2026-07-18T00:40:26Z")
A couple articles:
> A few years later, in 2014, Chen and his colleagues realized that serotonin (the mood-regulating “happiness hormone”) plays a big role in [perpetuating the itch-scratch cycle](https://www.cell.com/neuron/fulltext/S0896-6273(14)00901-5). They found that when mice scratch an itch, their brains release a surge of serotonin, resulting in a moment of pure bliss — but then, tragically, the hormone activates the same receptors that transmitted the itch signal in the first place, restarting the process.
>
> These results jibed with a _PLOS One_ brain-imaging study from the previous year, which showed that [scratching activates the brain regions involved in the reward circuit](https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0082389), a neural network that floods the body with euphoria-inducing chemicals in response to pleasurable activities (like sex) and substances (like drugs). It’s the same system that underlies addiction, which isn’t surprising if you’ve ever lost an hour digging into full-body mosquito bites with rapturous abandon.
**Why Scratching an Itch Feels So Good**
[https://www.discovermagazine.com/why-scratching-an-itch-feels-so-good-46439](https://www.discovermagazine.com/why-scratching-an-itch-feels-so-good-46439)
> **[Why Scratching Feels So Good (But Is So Bad)](https://www.webmd.com/skin-problems-and-treatments/scratching-feels-good)**
>
> When you’ve got itchy skin, your first instinct is likely to scratch -- a lot. WebMD explains why and how you need to resist that urge.
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### Author:  [@Senegoid](https://boards.straightdope.com/u/Senegoid)
#### Post date: [July 18, 2026, 1:34am UTC](https://boards.straightdope.com/t/why-does-scratching-an-itch-feel-so-good/1031749/3 "2026-07-18T01:34:29Z")
And all that scratching doesn’t even stop the itching! (Bug bites be damned to hell!)
However, a little dab of hydrocortisone cream (available at any pharmacy) works marvels!
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### Author:  [@minor7flat5](https://boards.straightdope.com/u/minor7flat5)
#### Post date: [July 21, 2026, 7:11pm UTC](https://boards.straightdope.com/t/why-does-scratching-an-itch-feel-so-good/1031749/4 "2026-07-21T19:11:51Z")
I often wondered why regular itching is nice to scratch, but poison ivy is in a class by itself: it is absolutely delightful to scratch–it is an order of magnitude above regular itching in “scratching pleasure”
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### Author:  [@DrDeth](https://boards.straightdope.com/u/DrDeth)
#### Post date: [July 21, 2026, 7:31pm UTC](https://boards.straightdope.com/t/why-does-scratching-an-itch-feel-so-good/1031749/5 "2026-07-21T19:31:05Z")
> [@PastTense](#):
>
> A couple articles:
Nice cites!!
> [@Senegoid](#):
>
> However, a little dab of hydrocortisone cream (available at any pharmacy) works marvels!
You can also get prescription strength from your doctor.
Also really hot water directed directly on the bite will shut off the itch for several hours. Make sure it isnt scalding hot, of course.
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### Author:  [@ricepad](https://boards.straightdope.com/u/ricepad)
#### Post date: [July 21, 2026, 7:36pm UTC](https://boards.straightdope.com/t/why-does-scratching-an-itch-feel-so-good/1031749/6 "2026-07-21T19:36:13Z")
> [@DrDeth](#):
>
> Also really hot water directed directly on the bite will shut off the itch for several hours. Make sure it isnt scalding hot, of course.
I have learned that applying heat to a mosquito bite - as hot as you can stand for as long as you can stand - will get rid of the itch permanently. I heard that the proteins in the toxins get denatured by the heat. No idea if that’s what really happens or not. I do know it works. My specific method is to boil some water and pour a bit into a small glass. Touch the glass to the bite, gently at first because it’s gonna be HOT. As the water cools, press it more and more firmly and hold it longer and longer. A total of 10 minutes has proven to be enough. I use water in a glass for thermal mass, there’s nothing magical about the water or the glass.
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### Author:  [@Eyebrows\_0f\_Doom](https://boards.straightdope.com/u/Eyebrows_0f_Doom)
#### Post date: [July 21, 2026, 10:09pm UTC](https://boards.straightdope.com/t/why-does-scratching-an-itch-feel-so-good/1031749/7 "2026-07-21T22:09:52Z")
> [@ricepad](#):
>
> I have learned that applying heat to a mosquito bite - as hot as you can stand for as long as you can stand - will get rid of the itch permanently.
I have been pleasantly surprised that the Bug Bite Thing (yes that’s its name) actually works! It’s a little plastic device with a suction plunger that you put over the bite. As long as you do it quickly after being bitten it stops the itch! I always take it with me when I am outside in mosquito-prone areas.
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### Author:  [@janis\_and\_c0](https://boards.straightdope.com/u/janis_and_c0)
#### Post date: [July 27, 2026, 3:13pm UTC](https://boards.straightdope.com/t/why-does-scratching-an-itch-feel-so-good/1031749/8 "2026-07-27T15:13:19Z")
Yes. Hot water is magnificent for scratching an itch. I learned this little life hack when I had bed bugs years ago.
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### Author:  [@Grrr](https://boards.straightdope.com/u/Grrr)
#### Post date: [July 27, 2026, 3:30pm UTC](https://boards.straightdope.com/t/why-does-scratching-an-itch-feel-so-good/1031749/9 "2026-07-27T15:30:55Z")
Wasn’t there a SD article done on this like a hundred years ago?
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### Author:  [@Hypno-Toad](https://boards.straightdope.com/u/Hypno-Toad)
#### Post date: [July 29, 2026, 1:00pm UTC](https://boards.straightdope.com/t/why-does-scratching-an-itch-feel-so-good/1031749/11 "2026-07-29T13:00:07Z")
I wish I’d known about the hot water trick when I was a kid.
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### Author:  [@dtilque](https://boards.straightdope.com/u/dtilque)
#### Post date: [July 30, 2026, 7:42pm UTC](https://boards.straightdope.com/t/why-does-scratching-an-itch-feel-so-good/1031749/12 "2026-07-30T19:42:44Z")
I find that for casual itches (not insect bites), just rubbing the itch works better than scratching with fingernails. After reading this thread, it’s probably because it doesn’t do the whole serotonin thing.
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### Author:  [@Hypno-Toad](https://boards.straightdope.com/u/Hypno-Toad)
#### Post date: [August 4, 2026, 5:07pm UTC](https://boards.straightdope.com/t/why-does-scratching-an-itch-feel-so-good/1031749/13 "2026-08-04T17:07:08Z")
Does the hot-water treatment work on poison ivy?