Conditions We Treat

Psoriasis

At Livingstone Dermatology, we understand that your skin is a reflection of your health and well-being. We are committed to the latest advancements in dermatological science, and dedicated to providing you with quality care.
Psoriasis is a chronic skin condition that affects roughly 1% of the Singaporean population.

Psoriasis is a chronic skin condition that affects millions of people worldwide, including many in Singapore. While not as widely discussed as eczema, psoriasis is a common dermatological concern, with estimates suggesting that it affects around 1% of the population

Psoriasis can develop at any age, but it typically first appears between the ages of 15 and 35. Though psoriasis is not contagious, it can significantly impact one’s quality of life, both physically, and emotionally.

What is Psoriasis?

Psoriasis is an autoimmune condition where the immune system mistakenly attacks healthy skin cells, triggering rapid cell turnover. This results in the buildup of dry, scaly plaques that cause redness, itching, and discomfort. The severity of psoriasis varies, with some individuals experiencing only minor irritation, while others face widespread flare-ups that affect their quality of life. In fact, the condition tends to follow a cycle, with periods of flare-ups followed by remissions.

What are the types of Psoriasis?

There are several types of psoriasis, including:

  • Plaque Psoriasis – plaque psoriasis is the most common type, affecting around 80 – 90% of those with psoriasis. It causes raised, inflamed, and scaly patches of skin, often appearing on the scalp, elbows, knees, and lower back.
  • Erythrodermic Psoriasis – erythrodermic psoriasis is a severe, and rare form of psoriasis that leads to widespread skin inflammation, shedding, and pain. It often requires immediate medical attention.
  • Inverse Psoriasis – inverse psoriasis appears in skin folds such as under the breasts, in the armpits, and around the groin. It often appears as smooth, shiny, red patches without the typical scaling seen in other forms.
  • Guttate Psoriasis – guttate psoriasis is often triggered by a streptococcal infection, and appears as small, red, drop-shaped spots. However, it is more common in children, and young adults.
  • Nail Psoriasis – nail psoriasis affects the fingernails and toenails, causing pitting, discolouration, and changes in nail texture.
  • Pustular Psoriasis – pustular psoriasis is characterised by pus-filled blisters surrounded by red skin, this type can be localised to certain areas or widespread across the body.
  • Sebopsoriasis –  sebopsoriasis is a cross between psoriasis, and seborrheic dermatitis, it appears on the scalp and face as greasy,  and yellowish plaques.
  • Psoriatic Arthritis – psoriatic arthritis affects approximately 30% of people with psorias, which causes joint pain, stiffness, and swelling. However, early treatment can help prevent joint damage.

 

What parts of the body are more prone to Psoriasis?

Some of the common areas, where psoriasis often develop, include:

  • Elbows, and knees
  • Face, including around the eyes, and ears
  • Fingernails, and toenails
  • Lower back
  • Palms and soles
  • Scalp
  • Skin folds, such as under the breasts, armpits, and groin

What causes Psoriasis?

Psoriasis can develop anywhere on the body, but it is more in common in the back, arms, legs, scalp, and face.

Psoriasis is usually a combination of genetics and triggers. It is caused by an overactive immune system that mistakenly accelerates skin cell production. Normally, skin cells take about a month to renew, but in psoriasis, this process happens within days. The excess cells pile up, forming the characteristic plaques and scales.

 

The exact triggers vary from person to person but can include:

 

  • Alcohol Consumption high alcohol intake has been associated with psoriasis flare-ups, and may reduce the effectiveness of certain treatments.

 

  • Genetics researchers suspect that genetics play a significant role in psoriasis. Certain genes are commonly associated with the condition, and an autoimmune response also contributes to its development. If a close relative, such as a parent, has psoriasis, you may have a higher likelihood of developing the condition.

 

  • Infections – certain viral, and bacterial infections can increase the risk of psoriasis or exacerbate existing symptoms. Infections such as strep throat, and HIV may contribute to psoriasis onset, particularly in those with weakened immune systems. Children, and young adults who experience recurrent infections, such as upper respiratory infections, may have an elevated risk of developing severe psoriasis. Other infections that can trigger psoriasis include bronchitis, influenza, sinus infections, and thrushes.

 

  • Obesity – studies indicate that obesity is a significant risk factor for psoriasis onset, and progression. Managing body weight may help alleviate symptoms, as weight loss has been linked to improvements in psoriasis severity.

 

  • Skin Trauma – new psoriasis lesions can develop in both expected, and unexpected areas due to skin injuries such as vaccinations, sunburns, or scratches. This phenomenon, known as the Koebner response, can also be triggered by persistent irritation, such as wearing tight clothing or accessories that rub against the skin.

 

  • Smoking – tobacco use has been linked to an increased risk of psoriasis, and may reduce the effectiveness of some psoriasis treatments, such as biologics.

 

  • Stress – chronic emotional or physical stress can contribute to the development or worsening of psoriasis, particularly in individuals with weakened immune systems.

 

  • Temperature, and Climate – extreme heat, cold, dryness or humidity may trigger psoriasis symptoms. While moderate sun exposure is often beneficial, excessive exposure to high temperatures or direct sunlight can worsen symptoms.

 

  • Medications some medications can either trigger psoriasis or worsen existing symptoms. These include:
  • Antimalarial drugs – can trigger flare-ups within 2 to 3 weeks of starting the medication.
  • Beta-blockers – may exacerbate psoriasis in some individuals.
  • Lithium – may aggravate psoriasis and worsen existing lesions.
  • Quinidine and indomethacin (Tivorbex) – these medications can worsen psoriasis symptoms.

What are the symptoms of Psoriasis?

One of the most recognisable signs is the formation of plaques, which appear raised, thickened patches of skin covered with silvery-white scales. Additionally, some of the common symptoms include:

 

  • Dry, cracked skin the affected areas may become extremely dry, leading to painful cracks or fissures.

 

  • Itching and discomfort – many people with psoriasis experience persistent itchiness, which can range from mild irritation to severe discomfort.

 

  • Nail changes – psoriasis can affect the fingernails and toenails, causing pitting (small dents), thickening, discolouration, or crumbling.

 

  • Plaques or rashes raised, inflamed, and discoloured patches of skin with a scaly or flaky surface.

 

  • Scaling and shedding the outer layer of plaques sheds easily, but deeper layers may remain stubbornly attached. Scratching can cause scales to tear away, leading to pinpoint bleeding (known as the Auspitz sign).

 

  • Skin pain or tenderness some plaques may feel sore or tender, especially if they crack or become inflamed.

 

  • Joint pain in some cases, psoriasis leads to joint inflammation, known as psoriatic arthritis, which causes swelling, stiffness, and pain.

What is the difference between Psoriasis and Eczema?

Psoriasis, and eczema are both chronic skin conditions that cause redness, inflammation, and itching. But they have distinct differences in their appearance, causes, and triggers. Understanding these differences can help in identifying the condition and seeking appropriate treatment.

 

Characteristics

Psoriasis

Eczema

Appearance

Characterised by thick, raised plaques with well-defined borders. The affected skin often has silvery-white scales that flake off. The plaques are usually inflamed, and the skin beneath may appear shiny, and red.


Typically appears as red, inflamed or weepy patches of skin with less distinct borders. The skin may look dry, cracked, or crusted, and in some cases, it oozes clear fluid, especially during flare-ups.

Itchiness, and Sensation

Itching can vary but is generally milder compared to eczema. Some people report a burning or stinging sensation instead.


The hallmark of eczema is intense itching, which can become unbearable, especially at night. Persistent scratching can worsen inflammation and cause the skin to thicken – a process called lichenification.

Triggers

Triggered by an overactive immune response, leading to rapid skin cell turnover. Common triggers include infections, stress, skin injuries, and certain medications.


Often triggered by external irritants and allergens, such as soaps, detergents, pollen, dust mites or pet dander. Weather changes and emotional stress can also worsen symptoms.

Affected Areas

Commonly appears on the scalp, elbows, knees, and lower back. It can also affect nails, causing pitting, thickening, or crumbling.


Frequently found in the creases of the elbows, and knees, as well as on the hands, neck, and face. In infants, eczema often appears on the cheeks, and scalp.

Underlying Cause

An autoimmune condition where the immune system mistakenly speeds up skin cell production, leading to plaque buildup.


Primarily linked to a weakened skin barrier, making the skin more sensitive to allergens, and irritants. It is often associated with other allergic conditions like asthma, and hay fever.

How is Psoriasis diagnosed?

As with any other skin condition, psoriasis is diagnosed through a combination of several diagnostic methods, such as:

  • Medical History Evaluation our dermatologist will ask about your symptoms, family history of psoriasis, potential triggers, and any underlying health conditions that may contribute to skin changes.
  • Visual Examination afterwards, our dermatologist will assess your skin, scalp, and nails for characteristic signs of psoriasis, such as well-defined plaques, silvery scales, and nail abnormalities. The location, and pattern of the lesions can also help distinguish psoriasis from other conditions like eczema or fungal infections.
  • Skin Biopsy if needed, a small sample of skin may be taken, and examined under a microscope to confirm psoriasis, and rule out similar conditions, such as eczema or lichen planus. This procedure involves removing a small piece of skin under local anaesthesia.

How is Psoriasis treated and managed?

Dermatologists often perform physical, and visual examinations to identify symptoms of psoriasis.

There is no permanent cure for psoriasis. However, there are a variety of treatments available to effectively manage symptoms, reduce flare-ups, and improve quality of life. The best treatment plan depends on the severity of the condition, the type of psoriasis, and individual response to therapies. At Livingstone Dermatology, treatments can include:

Topical Treatments

  • Corticosteroids   corticosteroirds help reduce inflammation, redness, and itching. These are commonly prescribed for flare-ups but should not be used long-term due to potential side effects such as skin thinning.
  • Coal Tar – coal tar is a natural treatment that reduces scaling, itching, and inflammation, suitable for mild psoriasis symptoms.
  • Salicylic Acid – salicylic acts as a keratolytic agent, helping to remove scales, and soften plaques, often used in combination with other treatments.
  • Vitamin D Analogues vitamin D analogues help slow the excessive skin cell growth that causes scaling, and thickened plaques. Some of the examples include calcipotriol, and calcitriol.

Phototherapy (Light Therapy)

  • Excimer Laser Therapy excimer laser therapy is a targeted UVB treatment that focuses only on affected areas, avoiding unnecessary exposure to healthy skin.
  • PUVA Therapy PUVA therapy is combination of UVA light, and a light-sensitising medication (psoralen) to improve psoriasis symptoms.
  • Ultraviolet (UV) Light Therapy – UV light therapy is controlled exposure to UVB light can slow excessive skin cell turnover, and reduce inflammation.

Systemic Medications

  • Biologic Therapies   biologic therapies are modern treatments that target specific parts of the immune system, such as tumour necrosis factor (TNF) inhibitors, interleukin (IL)-17 inhibitors, and IL-23 inhibitors. Although they are highly effective, it may increase infection risk.
  • Immunosuppressants immunosuppressant drugs like methotrexate, and cyclosporine help control the overactive immune response but require close monitoring due to potential side effects.
  • Oral Retinoids oral retinoids derived from vitamin A, these medications help slow skin cell growth and reduce inflammation.

Lifestyle and Home Care

  • Avoiding Long, Hot Showers lukewarm water and gentle, hydrating cleansers can prevent irritation.
  • Identifying and Avoiding Triggers – common triggers include cold weather, smoking, alcohol, and certain medications.
  • Keeping Skin Moisturised – applying fragrance-free moisturisers or emollients helps prevent dryness, and scaling.
  • Managing Stress stress can trigger flare-ups, so mindfulness, meditation, and relaxation techniques may help.
  • Maintaining a Healthy Weight and Balanced Diet some studies suggest that anti-inflammatory diets rich in omega-3 fatty acids may support symptom management.

Summary

Seeking treatment is essential to receiving accurate treatment, and improving the outcomes of treatment.

Psoriasis is a chronic skin condition that stems from an overactive immune system, leading to inflammation, scaling, and discomfort. While it is not contagious, it can significantly impact one’s quality of life if left unmanaged. 

It goes without saying that seeking medical advice early is key to managing psoriasis effectively. A dermatologist can provide a personalised treatment plan tailored to your condition, helping to control flare-ups, and improving skin health. Schedule a consultation with us today to take the first step towards healthier, and more comfortable skin.

Frequently asked questions

Is there a cure for psoriasis?

Currently, there is no permanent cure for psoriasis. However, various treatments can effectively manage symptoms, and reduce flare-ups. With the right approach, including medications, lifestyle adjustments, and medical therapies, many people with psoriasis can achieve long-term remission, and maintain healthy skin.

No, psoriasis is not contagious. It is an autoimmune condition, meaning it results from an overactive immune system rather than an infection. You cannot catch psoriasis from another person through physical contact, sharing personal items or exposure to skin flakes.

Yes, scratching or injuring psoriasis plaques can break the skin barrier, making it vulnerable to bacterial infections. Signs of an infection include increased redness, warmth, swelling, pus, and pain in the affected area. If you develop a fever or notice worsening symptoms, seek medical attention promptly.

Psoriasis is more than just a skin condition as it can be linked to other health concerns. Some common complications include:

  • Psoriatic arthritis (PsA) – a form of inflammatory arthritis that causes joint pain, stiffness, and swelling.
  • Cardiovascular disease – people with psoriasis have a higher risk of heart disease, and stroke.
  • Mental health challenges – living with a visible skin condition can contribute to anxiety, depression or low self-esteem.
  • Metabolic conditions – psoriasis has been associated with obesity, diabetes, and high blood pressure.

While psoriasis cannot be entirely prevented, certain lifestyle habits can help reduce flare-ups, and minimise symptoms. These include:

  • Avoiding known triggers such as smoking, excessive alcohol consumption or harsh skincare products.
  • Keeping your skin well-moisturised to prevent dryness and irritation.
  • Managing stress through mindfulness, relaxation techniques, or therapy.
  • Maintaining a balanced diet, and a healthy weight to reduce inflammation.
  • Protecting your skin from injuries, and infections that could trigger new lesions.

Psoriasis can impact daily life, but with proper management, many individuals continue to live full, active, and fulfilling lives. Seeking treatment, finding emotional support, and making lifestyle adjustments can significantly improve comfort, and confidence. If psoriasis is affecting your well-being, our dermatologist can help tailor a treatment plan to suit your needs.

Yes, some people experience periods where their psoriasis symptoms disappear completely — this is known as remission. Remission can last for weeks, months or even years, depending on individual triggers, and treatment effectiveness. However, psoriasis is a chronic condition, and flare-ups may return at any time. As such, consistent management, and professional guidance are key to keeping symptoms under control.

Diet alone does not cause or cure psoriasis, but certain foods may influence inflammation levels in the body. Some individuals find that reducing processed foods, excessive sugar, and alcohol while incorporating anti-inflammatory foods like fruits, vegetables, and omega-3 fatty acids can help manage symptoms. However, dietary triggers vary from person to person, so it is best to observe how your body responds.

Your Partner in Psoriasis Care

At Livingstone Dermatology, we understand the impact psoriasis can have on your daily life. Our experienced dermatologist is dedicated to providing expert care and support, helping you find relief and regain control over your skin health.

Ready to take the first step towards psoriasis relief?

Schedule a consultation with Livingstone Dermatology today.

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Whether you’re dealing with a specific skin concern or seeking to enhance your natural beauty, Livingstone Dermatology is here to guide you on your journey to healthy, radiant skin. 

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