ACD A-Z of Skin - Psoriasis

Psoriasis is a long-term (chronic) condition that may cause red, itchy, scaly patches on your skin. It happens when your immune system makes skin cells grow too fast. Psoriasis tends to come and go over time.
There are different types of psoriasis, and each can look different. It may appear on many parts of the body, including your:

Image showing a close-up of skin affected by psoriasis.
Psoriasis is not contagious. This means you can't catch it from someone else.
There are several types of psoriasis. Each type may look and feel different and can affect different parts of your body.
Plaque psoriasis is the most common type of psoriasis. The symptoms:
Nail psoriasis affects the fingernails and toenails. It may lead to:
Inverse psoriasis affects skin folds, such as:
It may look like smooth, red patches of skin that get worse with sweating or rubbing. It may be triggered by fungal infections.
Guttate psoriasis often starts in children or young adults. It may be triggered by infections, especially strep throat.
Symptoms may show as small, drop-shaped spots on your torso, arms and legs.
Pustular psoriasis may lead to yellow or white blisters filled with non-infectious pus (pustules). It may affect your hands and feet.
This type may sometimes lead to fever and swelling in your arms and legs. These are serious complications and you may need emergency care in hospital to treat this condition.
Erythrodermic psoriasisleads to widespread redness and peeling of the skin. Your skin may feel hot, itchy and painful.
Psoriatic arthritis affects the joints and areas where tendons attach to bones. It may lead to:
It often happens in people who already have skin psoriasis.

Normal skin and skin with psoriasis — skin with psoriasis shows redness and scaling.
Psoriasis is an immune system condition. It's not clear exactly what causes it but your genes may play a part. This means if someone in your family has psoriasis, you may be more likely to get it too.
A range of things can trigger or make psoriasis worse, including:
See your doctor if you notice red, scaly or raised patches on your skin that don't go away.
If you are diagnosed with psoriasis, see your doctor if:
Some types of psoriasis, such as pustular psoriasis, may be serious and may need urgent care.
If you feel unwell, or you suddenly develop a full-body red rash, see a doctor straight away.
Your doctor may diagnose psoriasis by looking at your skin. They may also ask you about your family's medical history.
Your doctor may refer you to a dermatologist for further tests, or to a rheumatologist if your joints are affected.
Sometimes, a small skin sample (called a biopsy) may be taken to confirm the diagnosis.
There is no cure for psoriasis but there are many treatments that may help manage it. What works best depends on how severe your psoriasis is and where it appears on your body.
Treatments may include:
Living with psoriasis can be challenging, but there are ways to manage your symptoms. Here are some tips that may help:
Psoriasis may affect your whole body and wellbeing. Some people may develop:
Psoriasis can also affect your social life. The skin rash might make you feel self-conscious, and harder to go out or spend time with others.
There is no known way to prevent psoriasis. You can help reduce flare-ups by following your treatment plan.
For more information about psoriasis, see the following websites:
You can also call the healthdirect helpline on 1800 022 222 (known as NURSE-ON-CALL in Victoria). A registered nurse is available 24 hours a day, 7 days a week.
Health Translations offers translated information on several topics, such as:
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Last reviewed: April 2025







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