Psoriasis: why it’s not really a skin problem
I get it. You wake up one day with patches of flaky, red, irritated skin and suddenly you’re Googling ‘psoriasis’ like there’s no tomorrow.
Psoriasis is a frustrating and confidence-crushing condition. It shows up at the most inconvenient times, making you feel like your skin is a neon sign screaming for attention.
The skin is our largest organ. But it might surprise you to learn that skin conditions like psoriasis, eczema, acne and rosacea aren’t generally caused by a problem with your skin.
These conditions start somewhere else entirely. Your skin is just where the trouble shows up.
In this guide, I will explore what psoriasis is, the symptoms, causes, the treatments available and how I, as a nutritional therapist, can help you get this condition under control.
What is psoriasis?
Psoriasis is an autoimmune skin condition. That means your immune system, the body's defence force, has got its wires crossed and started attacking healthy tissue instead of protecting it.
In psoriasis, this confusion speeds up the entire lifecycle of your skin cells. New cells are produced far faster than your body can shed the old ones, so they pile up on the surface. The result is those thick, scaly, red patches that are often itchy and sometimes properly sore.
So, while psoriasis looks like a skin condition, it is really an immune system issue wearing a skin disguise. Your body is, in a sense, turning on itself, and the inflammation and overproduction of skin cells are simply the visible evidence of that internal fight.
What are the symptoms?
Psoriasis doesn’t look the same for everyone, but the most common symptoms include:
Red patches of skin covered with thick, silvery scales
Dry, cracked skin that may bleed
Itching, burning or soreness
Thickened or ridged nails
Swollen and stiff joints
The usual hotspots are elbows, knees, scalp, even your face, but psoriasis is not fussy about location. It can show up just about anywhere.
Severity varies hugely too. For some people, it's a few small patches of dry skin. For others, it’s full plaques that crack, bleed and itch through the night. Either way, it's exhausting to live with day after day, and if you're at the stage where you dread certain outfits, certain seasons or certain occasions because of it, that reaction makes complete sense.
What is the root cause of psoriasis?
This is the question I get asked more than any other, so let's tackle it properly.
The honest answer is that there is no single root cause that applies to everyone. Frustrating, I know. What research does tell us is that psoriasis involves a malfunction in your immune system, specifically your T-cells and other white blood cells called neutrophils.
Normally, T-cells patrol your body looking for genuine threats like viruses or bacteria. In psoriasis, they mistake your own healthy skin cells for the enemy and attack them as if they were healing a wound or fighting an infection. The result is the inflammation and rapid cell turnover behind every patch and plaque.
But why does the immune system start misfiring in the first place? That is where it gets individual. In my clinic, I look at psoriasis as the visible result of several underlying systems being out of balance at once, most commonly your gut health, your immune resilience, your nutrient status and your stress load. Get curious about those four areas and you usually find at least one driver hiding in plain sight.
Common triggers for psoriasis
Alongside that underlying immune confusion, certain triggers can switch a flare on or make an existing one worse. Knowing your own triggers is one of the most useful things you can do, because it turns psoriasis from something that happens to you into something you have a fighting chance of managing.
The most common triggers include:
Genetics: if psoriasis runs in your family, your own risk goes up. Not a guarantee, but a factor worth knowing.
Stress: more on this one below, because the answer is yes, and it is a big one.
Metabolic syndrome: things like high blood pressure, high cholesterol and excess weight are all linked to psoriasis. Think of it as your body waving a big red flag and shouting that something needs attention.
Food sensitivities: when your body reacts badly to a particular food, it can trigger inflammation and disrupt gut health, both of which can worsen flares.
Toxic load: we are surrounded by low-level toxins in our food, air and homes. Build that up over years and it can overwhelm your body's systems, skin included.
Hormone imbalances: ever notice your skin gets worse at certain points in your cycle? Hormones have a real say in skin health, and an imbalance can be enough to tip you into a flare.
Air pollution: bad for your lungs and not exactly a friend to your skin either. Pollutants can inflame skin and worsen conditions like psoriasis.
Certain medications: some can interfere with immune function or throw your body off balance enough to trigger a flare.
Infections: viral, bacterial or fungal infections can all set off an autoimmune response, psoriasis included.
Smoking: if you needed one more reason to quit, here it is. Smoking raises your risk of developing psoriasis and makes it harder to manage once you have it.
Can psoriasis be caused by stress?
In a word, yes. Stress is one of the most consistent triggers I see in clinic, and there is solid logic behind it.
Think of your immune system as a smoke alarm. A bit of stress is like a candle flickering nearby, manageable, nothing to panic about. But chronic, ongoing stress is more like leaving the toaster smoking in the corner for weeks on end. Eventually that alarm becomes hypersensitive and starts going off at the smallest trigger. That is roughly what happens to your immune system under sustained stress. It tips into overdrive, and for many people that shows up on the skin as a flare.
If you've ever noticed your psoriasis getting worse during a stressful few weeks at work or after a difficult life event, you're not imagining the connection. Your body has simply made it for you.
What treatment is available?
There is currently no outright cure for psoriasis, but several treatments can help bring symptoms under control:
Topical treatments: creams and ointments applied directly to the skin. Corticosteroids are commonly used to reduce inflammation.
Phototherapy: regular, controlled exposure to ultraviolet light, with UVB therapy being the most common approach.
Oral or injected medications: this can include biologics that target specific parts of the immune system, or systemic treatments that work across the whole body.
Moisturisers: not a treatment as such, but keeping skin well hydrated genuinely helps reduce itching and scaling.
Here is the bit that frustrates me most about this whole picture. Very few GPs are trained to look beyond the skin itself, so these treatments, while they can offer real short-term relief, rarely touch the root cause.
It's a bit like mopping the floor every single day because there is a puddle, when what you actually need is someone to fix the leaky tap. The mopping helps, but it just never quite finishes the job.
How to reduce psoriasis naturally
This is where nutritional therapy comes in, and where things get genuinely interesting. Unlike conventional medicine, which tends to focus on managing symptoms, nutritional therapy uses a functional medicine approach that asks a different question entirely: what is actually driving this, and how do we deal with that?
Here's how I typically approach someone looking for natural support with psoriasis:
Look at you as an individual: your health history, your family's health history, your diet, your lifestyle and your environment all matter.
Help you manage stress: given everything we have just covered about stress and flares, this one is non-negotiable.
Support your gut and immune health: by building a more diverse, resilient microbiome.
Improve digestion: so you actually absorb the nutrients in the food you are eating, rather than letting them pass straight through.
Identify trigger foods: and remove anything that is fuelling inflammation or flares.
Add in skin-supportive foods: those shown to calm inflammation and support both skin and immune health.
Support liver function: so your body can clear toxins more efficiently.
On the nutrient side, vitamin D deserves a special mention. Low vitamin D status is common in people with psoriasis, and given that vitamin D plays a direct role in regulating immune function and skin cell turnover, it is one of the first things worth checking if you are dealing with flares. It is not a magic fix on its own, but it is a genuinely useful piece of the puzzle for a lot of people.
What tests can you run?
Everyone's root cause looks a little different, but because there is such a strong connection between your gut and your skin, one of the first things I usually recommend for a client struggling with psoriasis is a comprehensive stool test.
A stool test can reveal digestion and absorption issues, bacterial imbalances, yeast overgrowth, parasites or a leaky gut. All of these can fuel inflammation in the body and make psoriasis worse, often without you having any idea they are even there.
Once we know what is actually going on in your gut, we can start addressing the root cause properly, rather than guessing. And here is the genuinely satisfying part. Once the gut settles down, the skin usually follows.
Check out Harriet’s story here and see how a stool test got to the root cause of her condition.
Don’t struggle alone
If you or someone you know is struggling with psoriasis, please book a free chat with me and let’s get to the root cause of it together.