Psoriasis is a common, long-term skin condition that many people live with for years. It tends to come and go, and it can look and feel different from one person to the next. This guide explains, in plain language, what psoriasis is, the symptoms and triggers to look out for, how it is usually managed over time, and when it is worth seeing a doctor in person. Psoriasis is a chronic condition and is not contagious — you cannot catch it from, or pass it to, someone else.
What Is Psoriasis?
Psoriasis is a long-term (chronic) inflammatory skin condition in which skin cells build up faster than usual. This forms patches that can look red, pink or discoloured, often with a silvery or flaky scale. It commonly appears on the elbows, knees, scalp and lower back, but it can affect other areas too. Psoriasis involves the immune system and often runs in families. It is not caused by poor hygiene and it is not contagious.
Common Symptoms
Psoriasis can look different from person to person. Common features include:
- Raised patches of skin (plaques) with scale, often on the elbows, knees, scalp or lower back
- Redness or discolouration, flaking, and sometimes itching or soreness
- Dry skin that may crack
- Changes to the nails, such as pitting, ridging or thickening
- Flares that come and go over time
Scalp psoriasis
Psoriasis on the scalp can look like patches of scale and can be mistaken for stubborn dandruff. It may extend slightly beyond the hairline.
When joints are involved
Some people with psoriasis also develop joint pain or stiffness. If you notice joint symptoms, mention them to a doctor, as they may need separate assessment.
Common Triggers
Triggers differ from person to person, and not everyone can identify a clear trigger. Things that can sometimes set off or worsen a flare include:
- Stress
- Infections (for example a throat infection)
- Skin injury, such as a cut, scratch or sunburn
- Certain medicines
- Smoking and heavy alcohol use
- Cold, dry weather
Keeping a simple note of when flares happen can help you and your doctor spot your own patterns over time.
Psoriasis vs Eczema: How They Differ
Psoriasis and eczema can both cause red or discoloured, scaly skin, so they are sometimes confused. In general, psoriasis plaques tend to be thicker with a silvery scale and often appear on the outer elbows, knees and scalp, while eczema is often itchier and appears in skin creases such as the inner elbows and behind the knees. They are different conditions with different management, so it is worth getting the right diagnosis rather than guessing.
| Feature | Psoriasis | Eczema |
|---|---|---|
| Appearance | Thick plaques with silvery scale | Red, weeping or dry patches |
| Common locations | Outer elbows, knees, scalp, lower back | Skin creases — inner elbows, behind knees |
| Itching | Sometimes | Often more intense |
| Nail changes | Common (pitting, ridging) | Less common |
| Contagious? | No | No |
How Psoriasis Is Usually Managed
Psoriasis is a long-term condition, so management is usually about keeping symptoms under control over time rather than a one-off fix. General measures many people find helpful include gentle skin care, regular moisturising, and avoiding known personal triggers where possible. Beyond general care, a dermatologist can discuss options suited to your situation, which may include treatment where clinically appropriate. Because it is a long-term condition, reviewing how things are going over time is often part of managing it. Results vary from person to person, and psoriasis cannot be permanently cured.
When Direct Examination or Tests May Be Needed
Some situations are better handled with in-person care, because they may need a close examination, tests or ongoing monitoring. This may apply if you have:
- More severe, widespread or rapidly changing psoriasis
- Joint pain or stiffness that may need further assessment
- Treatments that require blood tests or monitoring before and during use
- An uncertain diagnosis where an examination would help
A doctor will explain when hands-on care is recommended.
When to Seek Prompt Medical Attention
Most psoriasis is not an emergency, but some less common situations need urgent, in-person care.
Seek prompt medical attention if you have: widespread redness covering much of the body or skin that is very painful; a fever alongside a skin flare; pus-filled spots appearing over large areas; or psoriasis that is worsening rapidly. These can be serious and need hands-on assessment rather than waiting.
Talking to a Dermatologist Online
If your psoriasis is stable and you would like to understand your options, you can consult a dermatologist online for psoriasis through a scheduled video consultation, without travelling to a clinic. An online consultation is useful for discussing your history, reviewing clear photographs and planning next steps, but it is not the same as a physical examination, and your dermatologist may recommend an in-person visit, tests or ongoing follow-up where needed. When booking, you can attach clear photographs of the affected skin using the attach-a-file option. A prescription is not guaranteed and depends on the dermatologist's assessment.
Online vs in-person
Online is convenient for history-taking, photo review and planning. In-person is needed for close examination of skin or joints, some tests, and certain treatments that require monitoring.
Frequently Asked Questions
Is psoriasis contagious?
No. Psoriasis is not contagious. It is a long-term (chronic) inflammatory skin condition, not an infection, so it cannot be passed from person to person through contact.
Can psoriasis be cured?
Psoriasis is a chronic condition and there is no permanent cure. For many people symptoms can be managed so they improve or settle for periods of time, but results vary and clearance or remission cannot be guaranteed.
What are the most common symptoms of psoriasis?
Raised patches of skin with scale (often on the elbows, knees, scalp or lower back), redness or discolouration, flaking, and sometimes itching, soreness or nail changes. Some people also have joint symptoms.
What can trigger a psoriasis flare?
Triggers vary, but can include stress, infections, skin injury, some medicines, smoking or alcohol, and cold, dry weather. Not everyone can identify a clear trigger.
Is it psoriasis or eczema?
They can look similar. Psoriasis plaques are often thicker with silvery scale on the outer elbows, knees and scalp, while eczema is often itchier and appears in skin creases. They are different conditions, so it is worth getting the right diagnosis.
Can psoriasis be discussed in an online consultation?
Yes, many people can discuss psoriasis during a scheduled video consultation, especially for history-taking, photo review and planning. Some situations still need an in-person examination, tests or ongoing monitoring.
Will I need tests or an in-person examination?
Sometimes. Depending on severity and the treatments being considered, a dermatologist may recommend an in-person examination, blood tests or monitoring. Your dermatologist will explain if this applies to you.
Does psoriasis affect the joints?
It can. Some people with psoriasis develop joint pain or stiffness, which may need separate assessment. Mention any joint symptoms to your doctor.
When should I seek urgent care for psoriasis?
Seek prompt in-person care for widespread redness over much of the body, very painful skin, a fever alongside a flare, pus-filled spots over large areas, or rapid worsening.
Medical disclaimer
This article is for general information and patient education only. It is not a substitute for professional medical advice, diagnosis or treatment, and does not diagnose any condition or recommend specific medicines. Always consult a qualified doctor about your symptoms, and seek immediate in-person care in an emergency.
