psoriasis overview for patients

Overview

Psoriasis is a chronic (long-lasting) skin condition that speeds up the skin cell life cycle. Skin cells build up rapidly on the surface, forming thick, silvery scales and dry, itchy, sometimes painful patches.

Yes, psoriasis is fairly common. Around 2–3% of people worldwide have it, depending on the country.

It can appear at any age, but it most often starts in two age ranges: between 15 and 35, and between 50 and 60. It affects men and women equally.

Symptoms

Common symptoms

• Red, raised patches of skin with silvery-white scales (plaque psoriasis)
• Dry, cracked skin that may bleed
• Itching, burning, or soreness
• Thickened, ridged, or pitted nails
• Scalp scaling that looks like dandruff
• Small, drop-shaped spots, especially in younger people

Symptoms in children

• Rashes may be smaller and more likely to appear on the face, elbows, knees, or scalp.
• Children may have more itching than adults.
• Droplet-shaped patches (guttate psoriasis) are more common after a sore throat or infection.
• In babies, psoriasis can look like severe diaper rash that doesn't clear with usual creams.

Symptoms in older adults

• Skin patches may be thinner and less scaly.
• It may affect areas like the lower back, elbows, and knees.
• Older adults often have other health conditions or take medicines that can make psoriasis harder to treat.
• Skin may become more fragile and heal more slowly.

Causes

Main causes

• Psoriasis is an autoimmune condition. The immune system mistakenly attacks healthy skin cells, causing inflammation and fast skin cell turnover.
• Genetics plays a role — you are more likely to have it if a close family member has it.
• Certain triggers can set off a flare, such as stress, infections, skin injury, cold weather, smoking, and heavy alcohol use.

Risk factors

• Family history of psoriasis
• Stress
• Infections (especially strep throat)
• Skin injuries (cuts, scrapes, sunburn, or surgery)
• Smoking and excess alcohol
• Some medicines, such as those used to treat high blood pressure or mood disorders (your doctor can review your medications)
• Obesity, which can make symptoms worse

When to see a doctor

See a doctor urgently if:

• If you have sudden, widespread redness or pus-filled bumps and feel unwell
• If you have joint pain and stiffness that is getting worse
• If you suspect a skin infection

Book a routine appointment if:

• If you have patches of skin that are itchy, scaly, or painful and do not go away or keep coming back
• If the condition is affecting your sleep, work, or everyday life
• If over-the-counter moisturisers are not helping
• If you notice changes in your nails, scalp, or joints

Diagnosis

A doctor or dermatologist (skin specialist) usually diagnoses psoriasis by looking at your skin, scalp, and nails and asking about your symptoms and family history. In most cases, no tests are needed.

Tests that may be done

• Physical examination of skin, scalp, and nails
• Medical history and family history questions
• Skin biopsy (a small sample of skin taken to look under a microscope) if the diagnosis is uncertain
• Blood tests if your doctor suspects joint involvement (psoriatic arthritis)

What to expect at your appointment

You may sit in a private room with your doctor or dermatologist. They will look at your skin and scalp and may gently scrape a small scale to check the appearance. If a biopsy is needed, it is a quick procedure with a local anaesthetic. You will usually get results in about a week.

Treatment

There is no cure for psoriasis, but many treatments can reduce symptoms, clear the skin, and improve quality of life. Your doctor will recommend options based on how severe your psoriasis is, where it appears, and your overall health. Treatment is usually stepped up or down over time.

Self-care at home

• Keep your skin well moisturised with fragrance-free creams or ointments.
• Take short, warm (not hot) baths or showers.
• Gently remove scales with a soft cloth after bathing — never pick at plaques.
• Avoid triggers you have noticed, such as stress, smoking, and heavy alcohol.
• Get gentle sunlight exposure, but avoid sunburn. Ask your doctor about safe amounts.
• Wear soft, loose clothing to reduce friction.

Medical treatments

Medical treatment for psoriasis is broadly grouped into topical treatments (applied to the skin, such as creams, ointments, and lotions), light therapy (controlled ultraviolet light under medical supervision), and systemic treatments (medicines that work inside the body) for more severe cases. A doctor will prescribe and monitor any treatment. Some treatments work by calming the immune system, while others slow skin cell growth. It is important to use them exactly as directed and keep your doctor updated about how they are working.

When is surgery considered?

Surgery is not a usual treatment for psoriasis. It is not a condition that is cured with an operation. However, if you need surgery for another reason, tell your team about your psoriasis, as it may affect skin healing or infection risk.

Living with this condition

Living with psoriasis means managing flare-ups and taking care of your skin and overall health. It can help to build a simple routine: moisturise daily, use prescribed treatments consistently, and notice what makes your skin better or worse. Many people find that stress reduction, gentle exercise, and good sleep help keep their skin calmer.

Lifestyle tips

• Practise stress management: breathing exercises, meditation, or hobbies you enjoy.
• Keep your skin moisturised every day, even when you have no visible patches.
• Stop smoking and limit alcohol.
• Protect your skin from cuts and injuries, which can trigger psoriasis at the injury site.
• Stay active — gentle exercise like walking or swimming can reduce stress and support your immune system.
• Talk to people you trust about how you feel; hiding your skin can add stress.

Diet and exercise

There is no special 'psoriasis diet' that works for everyone, but eating a balanced diet full of fruits, vegetables, whole grains, and healthy fats may help reduce inflammation. Regular exercise helps control weight and stress, which can benefit psoriasis. If you are overweight, losing even a little weight may improve your symptoms and reduce the strain on your body. Always discuss major dietary changes with a healthcare professional.

Mental health and emotional wellbeing

Psoriasis can affect how you feel about yourself and how you socialise, and it can be linked to anxiety and depression. It is not 'just a skin thing.' If you feel low, anxious, or worried about your appearance, talk to your doctor or a mental health professional. If you ever have thoughts of harming yourself, please reach out for help immediately — contact a crisis service or your local emergency number.

Prevention

Psoriasis cannot always be prevented because it is related to genetics and the immune system. However, you may be able to reduce flare-ups by avoiding known triggers, keeping your skin moisturised, managing stress, and maintaining a healthy lifestyle. It is a long-term condition, but many people go for long periods with clear skin.

Vaccines

Vaccines are an important part of staying healthy and can be given to most people with psoriasis. However, some treatments for psoriasis affect the immune system, so talk to your doctor about which vaccines are safe for you while on treatment. You should generally avoid live vaccines if you are taking medicines that weaken the immune system, but your doctor can guide you.

Screening programmes

There is no routine screening test for psoriasis. However, because psoriasis is linked to other conditions such as psoriatic arthritis, heart disease, and diabetes, regular health check-ups with your doctor are a good idea. Tell your doctor about any new joint pain or swelling.

Complications

If left untreated

• Skin can become cracked, painful, and vulnerable to infection.
• Nails may become damaged or fall off over time.
• Up to 3 in 10 people with psoriasis develop psoriatic arthritis, which causes joint pain, swelling, and stiffness.
• Severe, untreated psoriasis may increase the risk of heart disease, high blood pressure, type 2 diabetes, and depression.
• Rare forms, such as erythrodermic or pustular psoriasis, can become serious if not treated promptly.

Long-term outlook

Psoriasis is a lifelong condition, but with modern treatments and good self-care, most people can achieve clear or nearly clear skin. Flare-ups will likely still happen, but they can be managed. With support, you can live a full and active life. Researchers continue to develop new treatments, and the outlook is better than ever.

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