Psoriasis is a chronic skin disorder that affects 1% to 3% of the world’s population. It is characterised by periodic flare-ups of well defined, red patches covered by a silvery, flaky scale on the skin and the scalp. There are several variations of psoriasis, but the most common type is chronic plaque psoriasis. The exact cause is unknown, but it is believed that a combination of several factors contributes to the development of this disease.
In a normally functioning immune system, white blood cells produce antibodies to foreign invaders such as bacteria and viruses. These white blood cells also produce chemicals that aid in healing and fighting infective agents. But with psoriasis, special white blood cells called T-cells become overactive.
These T-cells “attack” the skin and set off a cascade of events that make the skin cells multiply so fast they start to stack up on the surface of the skin. Normal skin cells form, mature, then are sloughed off every 30 days. But in plaque psoriasis the skin goes through this whole process in 3-6 days.
Psoriatic arthropathy is a form of arthritis that many people with psoriasis can develop. It causes pain, swelling and stiffness in joints.
Damage and psoriasis
Sometimes an injury to the skin can cause the formation of a psoriasis patch. This is known as the Koebner Phenomenon, and it can occur in other skin diseases, such as eczema and lichen planus. It can take 2 to 6 weeks for a psoriasis lesion to develop after an injury.
Types of damage that can trigger a flare include abrasion – even mild abrasions, increased friction from clothing or skin rubbing against skin in folds, such as armpits or under breasts, sunburn, viral rashes, drug rashes and the weather.
Diet and psoriasis
Alcohol, sugar, coffee, fatty meats, refined processed foods, additives and deficiencies in minerals and other nutrients can induce attacks of psoriasis.
Calcium and psoriasis
Low levels of calcium have been reported as a trigger for psoriasis. Vitamin D3 plus vitamin K2 and some oil can treat psoriasis to enable absorption of calcium. Never take calcium supplements which can cause calcification of arteries and adversely affect the heart. Instead choose natural foods rich in calcium.
Highest sources of calcium in micrograms per 100 grams
- Dried herbs such as basil, dill, marjoram, rosemary and thyme 2113 mg
- Cheese such as goat’s, gruyere, parmesan, Romano and Swiss 1376 mg
- Sesame seeds 975 mg
- Mozzarella cheese 961 mg
- Tinned fish with bones such as sardines, mackerel and pilchards 383 mg
- Tofu 372 mg
- Almonds 264 mg
- Flaxseeds 255 mg
- Chlorella 221mg
- Mussels 180 mg
- Oysters 170 mg
- Brazil nuts 160 mg
- Prawns 150 mg
- Tripe 150 mg
- Scallops, spirulina and watercress 120 mg
- Whole milk and whole yoghurt 113 mg
- Chinese cabbage 105 mg
- Dark green leafy vegetables such as dandelion greens, kale, spinach, Swiss chard and turnip greens 99 mg
- Okra 77 mg
- Soya beans 75 mg
- Boneless fish such as bass, herring, pike, perch, pollock and rainbow trout 74 mg
- Kidney beans 70 mg
- Eggs 60 mg
- Broccoli 47 mg
Phosphates and psoriasis
Phosphates in foods can raise phosphorus levels which in turn reduces calcium levels which can worsen psoriasis. See>> Phosphate dangers
Vitamin E and psoriasis
Vitamin Eis required for healthy skin so it may be worth adding some vitamin E rich foods to the diet.
Highest sources of vitamin E in milligrams per 100 grams
- Wheat germ 149.4 mg
- Hemp seeds 55 mg
- Hazelnut oil 47 mg
- Almond oil 39 mg
- Sunflower seeds 38.3 mg
- Chilli powder 38.1 mg
- Paprika 38 mg
- Rice bran oil 32 mg
- Grape seed oil 29 mg
- Almonds 26.2 mg
- Oregano 18.3 mg
- Hazelnuts 17 mg
- Flaxseed oil 17 mg
- Peanut oil 16 mg
- Hazelnuts 15.3 mg
- Corn oil 15 mg
- Olive oil 14 mg
- Soya bean oil 12 mg
- Pine nuts 9.3 mg
- Cloves (ground) 9 mg
- Peanuts 8 mg
- Celery flakes (dried) 6 mg
- Spirulina 5 mg
- Dried apricots 4.3 mg
- Bell peppers (red), eel, olives and salmon 4 mg
- Jalapeno peppers 3.6 mg
- Anchovies 3.3 mg
- Broccoli, chicken, chilli peppers (sun-dried), cod, crayfish, dandelion greens, egg yolk, duck, goose, pecan nuts, spinach, tomatoes (tinned or pureed) turkey and turnip greens 3 mg
Drugs known to worsen psoriasis or induce a flare-up
- Chloroquine used to treat or prevent malaria
- ACE inhibitors used to treat high blood pressure. Examples include monopril, captopril, and lisinopril.
- Beta blockers also used to treat high blood pressure. Examples include lopressor and atenolol.
- Lithium a medication used to treat bipolar disorder
- Indocin an anti-inflammatory medication used to treat a variety of conditions, including gout and arthritis
- Corticosteroids, such as prednisone or solumedrol, can actually dramatically improve psoriasis. However, abruptly stopping the drug or rapidly tapering off of it can trigger a flare-up.
Stress, worry and psoriasis
Psychological stress has long been understood as a trigger for psoriasis flares, but scientists are still unclear about exactly how this occurs. Studies do show that not only can a sudden, stressful event trigger a rash to worsen, daily hassles of life can also trigger a flare up. In addition, one study showed that people who were categorised as “high worriers” were almost two times less likely to respond to treatment compared to “low worriers”.
Infections and psoriasis
Infections caused by bacteria or viruses can cause a psoriasis flare. Streptococcal infections that cause tonsillitis, or strep throat, tooth abscesses, cellulitis, and impetigo can cause a flare of guttate psoriasis in children. The human immunodeficiency virus (HIV) does not increase the frequency of psoriasis, but it does increase the severity of the disease.
Weather and psoriasis
Weather is a strong factor in triggering psoriasis. Exposure to direct sunlight, which usually occurs in the warmer months, often improves the rash. On the other hand, cold, short days seen in the winter months can trigger the rash to worsen.
Natural remedies for psoriasis
- Aloe vera (Aloe barbadensis miller)
- Anise (Pimpinella anisum)
- Araroba tree (Vataireopsis araroba)
- Basil (Ocimum basilicum)
- Black seed (Nigella sativa)
- Burdock root (Arctium)
- Chamomile (Matricaria recutita L.)
- Chinese rhubarb root (Rheum palmatum L. or Rheum palmatum var. tanguticum, Da huang)
- Clove (Syzygium aromaticum)
- Egg white (beaten to fluffy stage)
- Fennel (Foeniculum vulgare)
- Gotu kola (Centella asiatica L.)
- Jasmine (Cestrum diurnum)
- Khella (Visnaga daucoides))
- Mango (Mangifera indica)
- Oats (Avena sativa)
- Olibanum (Boswellia serrata)
- Oregon grape, barberry bark (Mahonia aquifolium)
- Parsley (Petroselinum crispum)
- Pine needle tea bath (Pinus)
- Queen Anne’s lace (Ammi majus L.)
- Tree tree oil (Melaleuca alternifolia, narrow leaved paper bark)
- Wintergreen (Gaultheria procumbens L.)
- Tamanu oil (Calophyllum inophyllum)
Related subjects
- A-Z of ailments
- Feed your friendly bacteria
- Anti-microbial healing plants and foods
- Bacterial infections and natural antibiotics
- Calcium
- Skin disorders
- Vitamin D
- Virus infections
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