Should You Scratch that Itch? Maybe Not

itchy_SkinSome of the most thoughtless habits we have can be the most destructive to our skin. Take, for example, scratching. It’s one of those actions you barely consider as you’re doing it. You skin itches; you scratch it. You could do it without even realizing it’s happened.

There are numerous reasons for itching, including dermatitis, bug bites, dry skin, liver disease, and many, many others. Itching could also be innocuous, caused by a tag on your shirt irritating your skin. Regardless, it’s a fascinating phenomenon that you might not have considered, and it’s certainly something that has an effect on your skin — especially if you do too much scratching.

What Is Itching and Why Does Scratching Make It Better?

Scatching_feet

The feeling of itching and relief of scratching has a lot to do with your brain.

Scientists once thought that itching was just a mild form of pain and worked its way through the same pathways as something that hurts. That was busted in 1987 when H.O. Handwerker, a German scientist, did a test where they used histamine — which causes itches — to make participants feel itchier and itchier until they hit as itchy as they felt they could take. But, curiously, the participants did not feel pain, meaning that the itching was taking a different pathway than pain (New Yorker).

Because itching and scratching, like yawning, are contagious (admit it, you’ve probably been scratching since the second sentence), it’s evidence that they’re likely very tied to the brain and nerve pathways (New York Times).

When scientists used histamine in monkeys’ skin, neurons in the spinal cord that register itching began firing. When researchers scratched near the stop they’d injected histamine, the neurons immediately stopped firing. Another study that looked at humans’ brains using MRIs found that scratching actually lessened activity in the parts of the brain that recall unpleasant memories or negative emotions and stimulated the part of the brain dealing with pain.

Both these studies demonstrate how profoundly connected the brain is in terms of itching (Science Daily).

Why Do We Itch So Much?

mosquito_itchy

Itchy skin is like an alarm system that lets you know when there might be trouble.

But why we itch is just as important a question as what causes itching. That’s a bit more difficult. Scientists think that perhaps it’s one of those evolutionary adaptations that explain so many of our quirks.

Itching is likely so sensitive because it’s intended to quickly alert people of potential dangers that could come from plants that cause irritation or, possibly life threatening, the presence of certain insects. Mosquitoes, for example, which carry several different diseases that can be fatal, have the kind of feather-light touch that can cause itching. Think of itching as a sort of evolutionary alarm system that tells the body to address something on the skin (St. Louis Magazine).

Since our ancestors couldn’t necessarily escape these stimuli, it was advantageous to draw attention to and get rid of them in another way: scratching. You can get rid of whatever it is cause the itch before it can do damage.

Why You Need to Be Careful: The Itch-Scratch Cycle

Scratching skin can relieve an itch, but it can also cause one as well. This is referred to as the itch-scratch cycle. When you scratch your skin too much, you can destabilize mast cells, a kind of immune cell. These release histamine, which, in turn, can cause you to feel itchy. So, while scratching can help stop an itch, too much scratching can actually worsen it (Trends in Neuroscience).

[Read More: The Five Bad Habits that Ruin Your Skin]

Scratching continuously can cause the tearing of skin that can lead to infection if it’s done to an extreme degree. Over a long time, it can also lead to the skin thickening and darkening. As you can see, this cycle can be detrimental and it’s best to avoid having to scratch the itch altogether. Fortunately there are some things that can be done (Medline Plus). First and foremost, if your itching is particularly bad or seems to be happening without reasons, see your doctor. It could be the sign of an underlying condition.

cerave_moisturizer

Be sure to keep skin moisturized, particularly in the winter, with something like CeraVe Moisturizing Cream ($14.97, amazon.com).

Aveeno_bath_treatment

If you do feel itchy, bathe in lukewarm water and consider using a product like Aveeno Soothing Bath Treatment ($6.96, amazon.com).

cortizone_10

Use an over-the-counter hydrocortisone cream, such as Cortizone 10 ($11.66, amazon.com) to stop itching.

benadryl

Or take an oral antihistamine, such as Benadryl ($8.88 for two, amazon.com) to subdue the histamine reaction.

Try a cool compress on the affected area. Wear loose fitting clothing. Distract yourself from the itch so that you aren’t tempted to keep scratching.

 

Bottom Line

Itching and scratching appears to have evolutionary roots and while we don’t understand everything about it, we do know that it has more to do with your brain than anything else. Over the years, science has uncovered that itching is not related to pain and that it has it’s own pathways in the body. Science has also discovered that scratching relieves itching by essentially quieting the neurons that fire and cause feelings of itchiness.

Scratching only relieves itching when it’s done in moderation, and it definitely won’t help certain conditions, as it can exacerbate them by causing the release of histamine, worsening the itch. It’s best to find another solution instead of scratching your skin until you get trapped in a terrible cycle!

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5 thoughts on “Should You Scratch that Itch? Maybe Not

  1. N. says:

    But my skin itches all the time because of fabrics. Only few fabrics don’t make me itch but I want to be able to use pretty clothes too! And not making holes on my clothes bbecause i have to cut off tags.

  2. Eileen says:

    What an interesting article! Oh, the number of times while growing up my mother would admonish me with, “Don’t scratch that!” or “Stop that scratching! You’ll make it worse.” I was an inveterate tree climber and loved playing in the bushes so I always had tiny scratches and bug bites on my arms and legs. Calamine lotion was my best friend. LOL

  3. Eileen says:

    Hi N,

    Of course you want to wear nice clothes, too. As for the itching, is it actually the fabric or is it the detergent and fabric softener? A lot of people react to the dyes and perfumes in those two things. You might want to try products specifically for babies or those formulated without dyes and perfumes. As for removing the tags, I don’t cut them out because that must leaves a sharp edge. Instead, I use a stitch remover and pluck out the thread that is holding the tag in place. It’s a nuisance to do, but most tags can be removed that way without damaging the clothing.

  4. N. says:

    I have tried changing detergent and fabric softener. Of course some are better for my skin but it is still the fabric. When I cut the tag out I remove it completely which is why sometimes I end up with holes. But a stitch remover is a good idea!

  5. Natalie Bell says:

    Hi N, thanks for your comments. Have you discussed this issue with your doctor? It could be that itchy skin is the symptom of an underlying condition. It could also be that you’re allergic to many fabrics. But with research ad trial and error, I hope that you’re able to find fabrics that don’t cause you to itch!

    Hi Eileen, thank you for reading and commenting! I remember being in agony about bug bites and having my mother tell me not to scratch them. I understand why that was now, but at the time it was unbearable!

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