Psoriasis treatments, triggers and facts

Psoriasis treatment diet supplements
Last updated 2 November 2022


Psoriasis (pronounced "sore-EYE-ah-sis") is an inflammatory skin disease where the skin cells grow too quickly resulting in white, silvery or red, thick patches. In healthy skin, the skin cells mature in approximately four weeks but with psoriasis they can mature in as little as three to four days, resulting in flaky build-up. It’s as if the skin is desperate to expel something irritating from within so it prematurely forces skin cells to the surface.

It is class as an auto-immune disorder and stress can trigger it to appear.

Psoriasis can be itchy and occasionally painful but it’s not contagious.

You can also have psoriasis and eczema at the same time.

Psoriasis Facts

Psoriasis can range from mild to moderate to very severe. The psoriasis rash can occur on any part of the body but it most commonly occurs on the scalp, face, elbows, knees and torso.

Psoriasis can also develop under/on the nails, knuckles, palms, genitals and on the soles of your feet.

There is a treatment plan at the end of this article.

  • Psoriasis affects more than 500,000 Australians
  • 7.5 million Americans have psoriasis according to the country’s National
  • Psoriasis Foundation
  • 2% to 3% of the world’s population is affected by psoriasis 
  • Psoriasis is present in all racial groups but it is slightly more common in fair-skinned people.
  • You are less likely to get psoriasis if you live somewhere tropical and sunny.

Common psoriasis symptoms:

  • Silvery or white scales
  • Red rash
  • Itchy and tender skin
  • Flaking, dry skin
  • Patches can join together and cover large areas (e.g. back)
  • Joints can be swollen and painful (known as psoriatic arthritis)
  • Fingernails/toenails change colour, pit, and separate from the nail bed
  • Dead skin build-up under nails

How is psoriasis diagnosed?

A doctor, dermatologist or other health care provider usually examines the affected skin and determines if it is psoriasis. A skin sample may also be sent to a lab for testing, if necessary.

Types of psoriasis:

  • Plaque psoriasis (most common type), also known as discoid psoriasis. Symptoms may include patches of red, raised skin on the trunk, arms, legs, knees, elbows, genitals, and/or scalp. Nails may thicken, become pitted, and separate from the nail beds.
  • Guttate [GUH-tate] psoriasis is characterised by small dot-like lesions. This type of psoriasis affects mostly children. A sore throat usually precedes the onset of this type of psoriasis.
  • Pustular psoriasis has weeping lesions and extensive scaling. It may occur on the palms, soles and other small areas or over the whole body.
  • Inverse psoriasis is characterised by severe inflammation.
  • Erythrodermic [eh-REETH-ro-der-mik] psoriasis has extensive shedding and redness of the skin.
  • Psoriatic arthritis presents with fatigue, tenderness, pain and swelling over tendons; swollen fingers and toes; stiffness and pain in one or more joints; reduced range of motion; morning stiffness and lethargy; red eyes and nail changes (nail separates from bed, pitting and fungal infections may occur). In 85% of patients, psoriasis precedes the joint disease so tell your doctor if you have psoriasis plus aches and pains.

Psoriasis can also appear when the skin has been injured, for example, from vaccinations, sunburns and scratches. This is called the Koebner [KEB-ner] phenomenon.

The Koebner response can be treated if it is diagnosed early. The symptoms of psoriasis may resemble other dermatologic conditions so consult a physician for a formal diagnosis.

Q: “What age does psoriasis usually appear?”

  • Psoriasis commonly develops between the ages of fifteen and 40 but it can occur at any age.
  • More than 75% of psoriasis cases occur before the age of 40.
  • Approximately 10% to 15% of people with psoriasis have it earlier than age 10.
  • Some infants have psoriasis, although this is very rare.

Psoriasis and genetics

People with psoriasis usually have an underlying genetic tendency that makes them susceptible to getting the condition. Scientists believe about 10% of the population have this genetic tendency. However, only 2-3% of the population develops psoriasis as it can lie dormant for many years and may never appear unless it’s awoken by some sort of ‘trigger.’

Psoriasis triggers

Psoriasis can be triggered or aggravated by the following:

  • high chemical exposure (this is common but many people don’t know they’ve been exposed)
  • cigarette smoke, smoking and passive exposure
  • injury
  • throat infection/poor health
  • drugs/medications
  • physical or emotional stress
  • alcohol
  • stress, anxiety and worry
  • chemical cleaning products
  • flea/cockroach ‘bombs’
  • living on a farm near crop spraying (chemical exposure)
  • trauma to the skin (scratch/surgery)
  • vitamin and mineral deficiencies (this is common)
  • cold climates

Smoking and psoriasis – the common trigger

A scientific study found that the more cigarettes you smoke and the longer the duration as a smoker, the more severe your psoriasis becomes.

Working out what caused your psoriasis

If the psoriasis appeared during adulthood or in your later childhood years then it’s a good idea to try to figure out what may have triggered it. The following activity is from The Healthy Skin Diet:

Questionnaire: When did your psoriasis first appear?

Think back to when your psoriasis first appeared — what was going on in your life at the time? For example,

  • Were you exposed to a new chemical or food?
  • Did you move house?
  • Did you renovate your house or put in new carpets?
  • Was your home or office sprayed with pesticides or were the carpets chemically cleaned?
  • Were you under great financial or personal pressure? (stress?)
  • Were you feeling rundown with a virus or throat infection? Earache, bronchitis, tonsillitis or a respiratory infection?
  • Were you prescribed a new drug or were you using pain-killers or another kind of medication?
  • Were you self-medicating with alcohol or cigarettes?

It’s important to work out what may have switched on your ‘psoriasis’ gene so you can see if you’re still being exposed to the problem. For example, if you figure that stress triggered your psoriasis then you can make sure you include relaxation techniques in your healthy skin program.

If your trigger was a throat infection, then you can support your immune system with relaxation and supplements, foods such as garlic and the Therapeutic Broth.

Medications that trigger psoriasis

Some medications are associated with triggering psoriasis, including:

  • Lithium: aggravates psoriasis in about half of those with psoriasis who take it.
  • Antimalarials: Plaquenil, Quinacrine, chloroquine and hydroxychloroquine may cause a flare of psoriasis, usually 2 to 3 weeks after the drug is taken. Hydroxychloroquine has the lowest incidence of side effects.
  • Inderal: worsens psoriasis in about 25 to 30% of patients with psoriasis who take it.
  • Quinidine: This heart medication has been reported to worsen some cases of psoriasis.
  • Indomethacin: can worsen some cases of psoriasis. Other anti-inflammatories usually can be substituted.

If you suspect your skin problem may have been triggered by a prescribed drug (and you’re still taking it) then speak to your GP about possible alternatives (FYI: don’t stop taking the drug without speaking to your doctor first).

Q: "I have psoriasis, it’s extremely uncomfortable and I’m shedding skin everywhere. What can I do to get some relief and reduce flaking?"

Psoriasis Treatment Plan

1. Water, oil and light therapy

A common therapy for treating psoriasis is sunlight therapy and when you combine it with the Eczema Diet or FID Program it is very helpful. Water, oil and light therapy (I like to call it WOL therapy) is natural, it doesn’t have the negative side effects that corticosteroids have and it’s practically free.

I recommend using WOL therapy in conjunction with a healthy diet and the psoriasis supplement (requires a prescription) for long-term results.

Psoriasis Research

An eight-week study published in the International Journal of Hypothermia found that warm bath treatments were also very effective in healing flaky lesions in psoriasis patients.

Seven people were asked to take very warm baths twice a week and three of them showed a rapid improvement in symptoms; the other four were told to increase bathing to every second day and three out of the four had improved symptoms.

Only one person’s lesions did not improve with bath therapy and coincidentally he was the only person in the study who was also using prescribed drug therapy. So WOL therapy may not work in conjunction with conventional psoriasis medications but please speak to your doctor first before discontinuing your prescribed drugs.

Psoriasis and vitamin D research

Another study found that people with severe psoriasis have decreased blood levels of vitamin D, compared with clear-skinned people and people with only mild psoriasis. You can obtain a daily dose of vitamin D by simply going out in the sun, because UV rays from sunlight trigger vitamin D production in the skin. (Being covered from head to toe with sunscreen can block vitamin D production so skip the heavy-duty sunscreen during WOL therapy — but use sunscreen if you are spending more than fifteen minutes in the sun.) Keep sunshine therapy to a healthy minimum, which is about ten to fifteen minutes a day.

I found that applying sunscreen made my psoriasis worse, and it improved when I went on the FID Program from The Eczema Detox

How to use WOL therapy 

Begin by wetting your skin with warm water — either by having a warm bath, a shower or by splashing yourself with water. Keep in mind that it’s best to allow the water to soak into the skin for a few minutes. Bathing is also a safe and effective way to gently remove some of the excess skin.

Pat your skin semi-dry, leaving some moisture on the skin, then rub in tiny (must be tiny!) amounts of 24-Hour Rescue Balm or natural pawpaw ointment. When applying the ointment remember that the less you use the better it works. Gently rub in the ointment until it’s completely absorbed and well rubbed in (this may take about 5 minutes, depending on the area you are covering.

  • Once you have applied a thin, well-rubbed-in layer of ointment onto the affected areas, you may notice that these areas end up feeling dry again. IMMEDIATELY, while the skin is still partially moist, rub another smidgin of ointment over the same spots of scaly skin. Rub in thoroughly once again. Follow this procedure at least twice a day for best results. When symptoms improve you can reduce this routine to once a day.
  • For accelerated results, use natural sunlight therapy daily after one of your ointment applications: ten minutes of sunshine daily, after wetting and moisturising the skin as described. After short sun exposure don’t wash off the ointment by having a shower. Instead, if it’s necessary, you can gently blot any excess ointment with a wet cloth.
  • TIP: Don’t try to remove dry patches of skin unless they are first wetted with water.
  • There is little or no benefit to putting a cream or oil onto the skin unless the skin is moist.15

2. Calcium to treat psoriasis

A part of any good psoriasis treatment plain is calcium. Calcium is one of the best treatments for psoriasis because it prevents skin cell build-up by increasing keratinocyte differentiation.(6)

So calcium can be a wonderful treatment for psoriasis as it is a skin disorder, where the skin cells have poor keratinocyte differentiation and uncontrolled proliferation.(7)

I used a combination of calcium and magnesium to successfully treat my psoriasis — only a low dose of calcium was needed and it worked quickly when combined with the eczema diet. 

Keep in mind that calcium needs magnesium in order to be utilised properly by your body.  

Magnesium transports calcium into your skin, teeth and bones, where it needs to go, and without it calcium could be left floating around your arteries. So don’t take calcium without magnesium — it’s that important.

Together, calcium and magnesium calm the nervous system so you feel chilled and have a better night’s sleep. But did you know they also play a starring role in the quest for beautiful skin?

  • Calcium is needed for proper skin barrier function and damage to the skin barrier causes a decrease in calcium (8). Defects in the skin barrier are seen in conditions such as eczema and severe dry skin.

  • Calcium is needed to promote the ‘acid mantle’ (an acidic pH) on your outer skin layer, which is like the fortress that wards off microbes and infections on your skin. As you age, the acid mantle declines and calcium levels decrease.(9)

  • Your skin must also respond to weather extremes, and in low humidity (dry weather) calcium helps to maintain the right amount of moisturising lipids by triggering their production when required. These lipids are water-resistant so they trap water in the skin so it does not dry out; so calcium is essential for people with dry skin.

  • Low calcium levels in the epidermis layer of your skin hamper the natural exfoliating process so dead skin cells build up, leading to premature ageing and dry and dull skin.

Vitamin D also plays a role when it comes to calcium absorption, hence the WOL therapy where you expose your skin to light in order to increase vitamin D production in your skin.
If you live in a cold or wet climate and are indoors often, get your doctor to test for vitamin D deficiency, then take a vitamin D supplement if prescribed by your doctor.

    How much calcium for healthy skin?

    The daily recommended intakes for calcium are very high and based on small, poorly designed short-term studies. In the United States and Australia, the recommended amount of calcium is 1000 mg daily, whereas in the United Kingdom 450–550 mg is considered an adequate intake for good health.(10)

    Considering how depleted most people are in magnesium, it’s not advisable to take high doses of calcium. In fact, high-dose calcium supplementation will eventually cause magnesium deficiency, as calcium needs magnesium for its absorption.

    So for healthy skin, nails and bones, I recommend taking a calcium supplement with magnesium and get at least half of your daily calcium intake from food sources.

    I prescribe calcium and magnesium in a 1:1 ratio (300 mg of each) so calcium is properly absorbed and there is no risk of magnesium deficiency — it’s wonderful before bed as it promotes a good night’s sleep especially when combined with glycine, which also improves sleep quality.(11)

    As I could not find any supplements that met these guidelines, I developed Skin Friend PM as it contains magnesium and calcium (300mg each) and glycine, for people with skin inflammation and poor sleep.

    Click here to read more about Skin Friend PM for psoriasis.


    Diet for Psoriasis

    Regarding dietary changes for treating psoriasis, my patients with psoriasis have done well on the FID Program, from The Eczema Detox, as it helps them to diagnose food intolerances and clearly see for themselves if an intolerance to a number of foods is worsening their psoriasis.  

    After following the FID Protocol, they discovered their specific triggers and then they knew which foods to avoid. Plus they took calcium and magnesium to normalise their skin shedding, and their symptoms slowly cleared up.

    One of my psoriasis patients also had an autoimmune thyroid disease where she felt like she was being choked all the time! And that horrid coking feeling went away while following the FID Program. She did not care about having to avoid a range of foods, she was just so relieved to be feeling normal again. She got her life back!

    Food intolerance can come and go, it can arise at any age, and it is commonly liked with autoimmune disorders such as arthritis and Celiac disease. 

    The psoriasis link

    Psoriasis has been linked to celiac disease and gluten intolerance, so while you are following the FID Program, you should also avoid gluten (12).

    Many patients in this particular research study were also sensitive to carrots and potatoes (12). These vegetables are not included in the FID Program, making it easy for people with psoriasis to follow the program.

    The FID Program

    The FID Program is a diagnostic tool to work out your specific triggers, so you can test gluten and other foods during the testing phase of the FID Program. This testing phase takes the guesswork out of prescribing a diet that is right for you. 

    For more information about the FID Program, and for FREE eczema diet and FID recipes plus online support, visit ECZEMADIET.COM and sign up to the free membership to get started immediately.



      1. Fischer, K., The Healthy Skin Diet, Exisle Publishing, 2008.

      2. Medical Library, 2005, ‘News from the American Medical Association: smoking associated with the severity of psoriasis’.

      3. Boreham, D.R, Gasmann, H.C. and Mitchel, R.E. 1995, ‘Water bath hyperthermia is a simple therapy for psoriasis and also stimulates skin tanning in response to sunlight’, International Journal of Hyperthermia, vol.11, no. 6, pp 745-54.

      4. Staberg, B., et. al. 1987, ‘Abnormal vitamin D metabolism in patients with psoriasis’, Acta Dermato-Venereologica, vol. 67, no. 1.

      5. Boyle, N., Lawton, C. and Dye, L. 2017, ‘The effects of magnesium supplementation on subjective anxiety and stress — a systematic review’, Nutrients, 9 (5), p. 429. 

      6. Lee, S.H., Jeong, S.K. and Ahn, S.K. 2006, ‘An update of the defensive barrier function of skin’, Yonsei Medical Journal, 47 (3), pp. 293–306.

      7. Arul, S., Dayalan, H., Jegadeesan, M. and Damodharan, P. 2016, ‘Induction of differentiation in psoriatic keratinocytes by propylthiouracil and fructose’, BBA Clinical, 6, pp. 82–6.

      8. Lee, S.H., Jeong, S.K. and Ahn, S.K. 2006, ‘An update of the defensive barrier function of skin’, Yonsei Medical Journal, 47 (3), pp. 293–306.

      9. Rinnerthaler, M. and Richter, K. 2018, ‘The influence of calcium on the skin pH and epidermal barrier during aging’, pH of the Skin: Issues and Challenges, 54, pp. 79–86.

      10. Willett, W.C. and Ludwig, D.S. 2020, ‘Milk and health’, New England Journal of Medicine, 382 (7), pp. 644–54.

      11. Bannai, M. and Kawai, N. 2012, ‘New therapeutic strategy for amino acid medicine: Glycine improves the quality of sleep’, Journal of Pharmacological Sciences, 118 (2), pp. 145–8.

      12. Barilo, A.A. and Smirnova, S.V., 2020. The role of nutritional factors and food allergy in the development of psoriasis. Voprosy pitaniya= Problems of Nutrition89(1), pp.60-68.