If you’re suffering from dry, itchy, flaky skin or have psoriasis or eczema, you probably haven't thought about how your thyroid is involved. Why would you? When you’re dealing with something as conspicuous, annoying, and painful as skin rashes, it’s difficult to think about anything other than getting rid of them.
Believe me, I know. Before I went gluten-free and healed my gut, I suffered from chronic eczema and other skin issues. I would have done almost anything to get rid of the embarrassing rashes and visible inflammation.
Now I know that eczema, psoriasis, and other skin rashes are never just skin deep.
Your skin is more like a signal of what’s going on inside of you … a signal that everyone can (unfortunately) see.
And for the estimated 20 million people in the US who suffer from thyroid disease, the prevalence of skin rashes is even higher.
Let’s dig into some of the ways your thyroid, your gut, and your skin are related, and where to start on your healing journey if you suffer from thyroid skin rashes.
What Does Your Thyroid Have to do With Skin Rashes?
Your thyroid is well known for regulating your body temperature and metabolism. But there’s way more behind the scenes at play. Thyroid hormones have receptor sites in every cell in your body; meaning an underactive thyroid has the potential to disrupt cell metabolism and detox throughout your body.
There are two major ways your thyroid and skin health are related.
#1 Low Thyroid-Gut-Skin Rash Connection
You simply cannot have healthy gut function with a poorly functioning thyroid.
Among other things, thyroid hormones (TH) contribute to keeping tight junctions in the stomach and the skin tight, so they stay sealed and don’t let stray molecules in or out.
TH also helps intestinal mucosa cells get to full maturity. When intestinal mucosa isn’t fully developed and tight junctions begin to loosen, you’ll begin to see symptoms like:
- Decrease in hydrochloric acid (gastric acid) production
- Leaky gut syndrome
- Food sensitivities
- Gut symptoms (ie. gas, bloating, diarrhea, constipation, nausea)
- Slow motility (that can lead to Small Intestine Bacterial Overgrowth (SIBO))
- Fungal overgrowth
- Bacterial overgrowth
- Gut pathogens
- Brain fog
All of these symptoms make it tough for your body to process and excrete toxins. The more your body holds onto toxins, the more we begin to see the physical ramifications of this in the form of rashes and other skin issues.
Leaky gut and SIBO wreak havoc on your gut lining and can even trigger autoimmune diseases that include dermatitis herpetiformis, vitiligo, psoriasis, dermatomyositis, lupus, Hashimoto’s Thyroiditis, and even eczema.
#2 Low thyroid function reduces blood flow to your skin.
Hypothyroidism reduces blood flow to your skin.
This is bad news.
While your skin is an organ, it also happens to be of the lowest priority. And reduced blood flow to the lowest priority organ (your skin) means a couple of things according to acupuncturist Brie Wieselman, L.Ac.
First, nutrients and oxygen can’t properly flow to the skin cells to aid in detox, repair, and regeneration. As a result, the environment around your skin cells can become rather toxic and unhealthy. That certainly makes it difficult for healthy cellular turnover.
And the cells don’t have enough nutrients vital for healthy turnover (which happens about every 28 to 40 days). When you can’t make healthy new cells, that’s how you end up with unending skin rashes.
Second, when you have hypothyroidism, there’s also less TH, in general, to aid in cellular metabolism which prevents the skin from releasing toxins properly.
When #1 (gut dysbiosis and a higher toxic burden on the inside) and #2 (decrease in blood flow inhibiting the skin’s natural detox capabilities) combine, it’s a perfect storm for a massive buildup of waste, which can trigger a myriad of skin issues, eczema and psoriasis just being two of them. There’s a reason that dry, itchy, brittle skin, hair, and nails are some of the first physical symptoms of hypothyroidism.
This is also the reason why slathering yourself in lotions and steroid creams rarely work. When you can’t shed old skin cells or excrete toxins properly, your body can’t create new, healthy skin cells either. Most lotions are just adding to the problem, making it harder to shed the old and let the new flourish.
How to Heal Your Thyroid Skin Rashes
If the underlying cause of your skin rash is related to thyroid disease or disorder, it’s important that you look at your healing with a holistic lens. Your thyroid regulates nearly every metabolic pathway in your body, affecting everything from your brain to your digestion to your skin.
No amount of steroid creams or topical potions will heal the lining of your gut or reduce systemic inflammation.
To help get you started, here are some steps to healing from the inside-out.
Optimize Thyroid Function
I often tell clients that you can’t outsmart or out-work your thyroid. If your levels are not optimal (or close to there), it’s difficult to get your skin back on track since so much of its healthy function is tied to your thyroid.
As always, request a full thyroid panel that includes:
- TSH
- Free T3
- Free T4
- Thyroid antibodies
- Reverse T3
From there, you have the opportunity to work with your doctor to address if medication is necessary or if your dosage needs adjustment. And sometimes you may need to shift away from a T4 replacement drug to a T3/T4 combo like Armour in order to start seeing improvement according to Dana Trentini of Hypothyroidmom.com.
This piece is critical because I’ve found with clients that dialing in your thyroid medication will allow for faster improvements. You’ll no longer be fighting against the current to get your thyroid skin rashes to resolve while working on the other pieces of your skin rash puzzle.
Identify Your Food Triggers
The first line of defense when it comes to healing skin rashes is to identify your food triggers. Eliminating inflammatory and triggering foods will not only help short-term inflammation and flares, but will help heal your gut long-term as well.
Triggering foods can increase inflammation of your gut lining making it really hard to digest and assimilate nutrients from your food.
To be fair, eczema specifically has more potential food triggers than those which are typically recommended for addressing Hashimoto’s and other autoimmune diseases.
There are more common food triggers like gluten, dairy, and eggs. Unfortunately, many integrative practitioners agree that while no clinical data exists, eggs are often problematic for those with eczema.
The potential eczema food triggers you probably haven’t heard of include:
- Nickel-rich foods (source)
- Histamine-rich or producing foods
- Nitrates
- FODMAPs
- Salicylates
- Histamines
- Nightshades
- Sulfites
- Amine-rich foods
By no means should you attempt removing all of these foods at the same time. Each of these triggers contains a lot of different common foods. Doing so will be utterly overwhelming without any guarantee that you’ll actually feel better.
You can test out each one at a time for a week or two, but ultimately this should be coupled with check out gut function and identifying any potential gut infections or dysbiosis. Removing food triggers alone will not resolve your eczema skin rashes if there are underlying gut issues that must also be addressed.
Manage Stress to Banish Thyroid Skin Rashes
Besides sugary and processed foods, stress is enemy number one when it comes to healing thyroid function and skin rashes in general.
You are probably familiar with cortisol, a stress hormone created by your adrenal glands in response to any sort of stress. Cortisol gets a bit of a bad rap because we usually associate it with excessive stress and burnout. But you need cortisol to function, so it’s not all bad.
I like to approach cortisol management as more of a balancing act, rather than blatantly trying to inhibit output. We need cortisol in order to thrive, but we certainly don’t want too much as it can lead to extreme fatigue over time.
And high cortisol levels over time make it harder to rebalance your thyroid!
One very common complaint of people with skin rashes is the non-stop itching (especially at night). It appears that there is a connection between stress, cortisol levels, and how itchy your skin is.
Elevations of cortisol appear to rise as itchiness increases. This is a pattern often seen in those with disruptions in their circadian rhythm where cortisol becomes elevated at night when it should be much lower.
That’s why it’s so important to manage your stress and get your overall circadian rhythm back on track.
- Breathing exercises (practiced even just 2 minutes per day)
- Meditation
- Reduce sugar (even natural sugar)
- Light exercise or movement
- Getting outside or going for a walk
- Putting your phone on airplane mode or shut off digital notifications
- Take a digital detox
These are my go-to breathing exercise recommendations that I share with clients:
Remember, stress doesn’t always have to be a huge life event or even something bad.
It could be something as seemingly harmless as reading the news every day or sitting in traffic for an hour. Work or a new baby or planning a wedding all sound positive enough, but even happy planning can get in the way of valuable self-care. Take some time for yourself, even in small ways throughout your day and notice the difference.
Ditch Endocrine-Disrupting Products
Your skin is one of the largest organs and it also has the capacity to absorb what you put on it.
Hormone-disrupting lotions, cleansers, and beauty products line the shelves of every drug store and beauty counter. Even some of the most expensive brands on the market contain chemicals that can alter your body’s natural hormonal pathways and really screw up your thyroid.
Even many that promise dry skin relief for those with eczema and psoriasis are often loaded with this type of chemical junk. So don’t be fooled by the marketing claims made on products like this that they are necessarily good for your skin and body.
Research on long-term, low-level exposure to a vast array of toxic chemicals is still lacking in humans, but we do know that the following have thyroid-disrupting effects:
- PCBs
- Phthalates
- Bisphenol A (BPA)
- Brominated flame retardants and perfluorinated chemicals
Screen your personal care products for endocrine-disrupting chemicals via the Environmental Working Group’s Skin Deep database. It’s an excellent resource that will help you figure out what’s safe and what’s not.
From there, start clearing out your cabinets. Start with skincare and body care products, then replace candles, perfumes, other sprays, soaps, and cleaning supplies. For incredible, all-natural (and might I say, anti-aging) skincare, I highly recommend staying small batch, all-natural, and organic.
Banish Your Thyroid Skin Rashes For Good
Since I’ve personally been around the block when it comes to debilitating skin rashes that just won’t go away, do not despair! There certainly is hope.
Just keep in mind that most people have 3 to 4 different skin rashes triggers (your thyroid function is one of them). It’s imperative to be comprehensive in your quest so that you identify all of the root causes and efficiently address them.
If you're looking for the list of labs to ask your doctor about, HERE'S THE LIST!
The first place to start is looking at your diet and thyroid function!
Hi Jenny
I have eczema and I am hypothyroid because my body is not converting T4 to T3.
So I read your article on psoriasis with interest and then found an article on eczema as well.
I suffered this last week from a terrible burning rash, which was worst around my sternum and collarbones. In the end I had to go to the doctor. (If you wait outside the surgery at 8.30 am you can get an appointment the same day! Practical but not civilised!)
The doctor listened carefully and then prescribed me with an antihistamine – Loretadine , because he thought it was an allergy. I am only allowed one tablet a day, so I feel even more itchy when the effect wears off! I think it will work, though in a few days.
While the beautiful faux fur coat that I bought in November, has had to go to the Salvation Army Charity shop. I used to be able to wear faux fur once, then I think manufacturing process has changed. A child’s fur covered hot-water-bottle upset my skin some time back (how do little babies cope?) Now I daren’t even look at fur any more.
Hi Liz, it sounds like there’s something in the faux fur that your skin may have become sensitive to. Not sure what, but it’s possible to become sensitive to anything AND lord only knows what the faux fur may be sprayed or coated with that the naked eye cannot perceive. So it might not be the fur, but a chemical.