13286 Psoriatic Arthritis

Overview

Psoriatic arthritis is a type of arthritis that happens when your immune system mistakenly attacks your joints and skin. It causes joint pain, stiffness, and swelling, and it often occurs with psoriasis, a skin condition that causes red, scaly patches. It is not contagious, and treatment can help control it.

Psoriatic arthritis is not rare, but it is not as common as psoriasis. About one in three people with psoriasis may later develop psoriatic arthritis. In the general population, it affects about 1 to 2 in every 100 people.

Psoriatic arthritis usually begins between the ages of 30 and 50, but it can start at any age, including in children. People who have psoriasis are more likely to get it, and it also runs in families. Men and women are affected about equally.

Symptoms

Common symptoms

• Pain, swelling, and stiffness in one or more joints, especially fingers and toes
• Joints that feel warm or look red or puffy
• Stiffness in the morning that lasts more than 30 minutes
• Pain in the lower back, buttocks, or neck
• Changes in fingernails or toenails, such as pitting, ridges, or lifting
• Tiredness or feeling worn out
• Skin patches with silvery scales, often on elbows, knees, or scalp
• Swelling of a whole finger or toe that looks like a sausage
• Pain where tendons or ligaments attach to bone, like the heel or Achilles area

Symptoms in children

• Children can have the same joint pain and skin changes as adults, but it can be harder to notice.
• A child may limp or avoid using a joint without saying why.
• Some children may have only one swollen joint at first.
• If your child has joint pain lasting more than a few weeks, ask a pediatrician or a family doctor for assessment.

Symptoms in older adults

• Older adults may have more stiffness and may mistake psoriatic arthritis for everyday aging or osteoarthritis.
• Pain can get worse with other conditions like diabetes or heart disease.
• It may affect balance and make falls more likely, so extra care with movement is helpful.
• Older adults should still see a doctor because safe treatments are available and can improve quality of life.

Causes

Main causes

• The immune system becomes overactive and attacks healthy tissue in the joints and skin, causing inflammation.
• Genes play a role — certain inherited traits make some people more likely to develop it.
• Environmental triggers, such as infections or stress, may activate the condition in people who are already at risk.

Risk factors

• Having psoriasis, especially if it is widespread
• Having a family member with psoriasis or psoriatic arthritis
• Being between 30 and 50 years old, though it can happen earlier
• Being exposed to certain infections that may trigger the immune system
• Smoking or heavy alcohol use, which can worsen inflammation

When to see a doctor

See a doctor urgently if:

• If you have a hot, swollen, extremely painful joint — especially with a fever
• If your child limps or refuses to use a joint for more than a few days

Book a routine appointment if:

• If you have joint pain, stiffness, or swelling that lasts more than a few weeks
• If you have psoriasis and start noticing joint symptoms
• If you feel unusually tired along with joint pain

Diagnosis

There is no single test for psoriatic arthritis. A doctor will listen to your symptoms, examine your joints and skin, and ask about your personal and family health history. They may then arrange tests to help confirm the diagnosis and rule out other types of arthritis.

Tests that may be done

• A physical exam to check for tender, swollen, or stiff joints
• Blood tests that check for inflammation and rule out other conditions, though they are not enough on their own
• X-rays, ultrasound, or MRI scans to look at joint damage and inflammation
• Sometimes a small sample of fluid from a swollen joint is taken with a needle to exclude infection

What to expect at your appointment

You may be referred to a rheumatologist, a doctor who specialises in joint and autoimmune conditions. This may take a few weeks, but you do not need to be in severe pain while you wait — your general practice team can offer advice on managing symptoms until you are seen.

Treatment

Treatment aims to control inflammation, relieve pain, and prevent joint damage. It usually involves a combination of medicines, self-care, and sometimes physical therapy. With good treatment, many people with psoriatic arthritis live normal, active lives. Always work with your healthcare team to choose a plan that is right for you.

Self-care at home

• Keep moving — gentle activities like walking, swimming, or stretching help keep joints flexible.
• Use warm packs for stiff joints and cold packs for swollen, painful joints.
• Rest when your joints feel very tired or inflamed, but avoid staying still for too long.
• Protect your skin with moisturisers and gentle skincare, especially if you have psoriasis.
• Break tasks into small steps and use tools that reduce strain on your hands.

Medical treatments

Doctors may suggest different types of medicines depending on how active your disease is. Some medicines reduce pain and swelling. Others, called disease-modifying treatments, calm the immune system more broadly and can slow down joint damage. In some cases, injections may be given directly into a joint, or stronger treatments called biologics may be used — these are given as injections or infusions to target inflammation. Your doctor will discuss the benefits and risks of each option and decide with you what is safest. Never start or stop a prescription medicine without talking to a healthcare professional.

When is surgery considered?

Surgery is rarely needed, but if a joint is severely damaged and other treatments no longer help, an operation such as a joint replacement can relieve pain and improve movement. Your doctor will only suggest surgery after trying other options.

Living with this condition

Try to find a balance between activity and rest. Plan your day so you can save energy for things that matter. Tell friends, family, and colleagues about your condition so they understand your needs. Keep a simple diary of joint symptoms — it can help you and your healthcare team spot patterns and adjust your plan.

Lifestyle tips

• Stay as active as you can — physical activity reduces stiffness and protects joints.
• Quit smoking and limit alcohol, as both can increase inflammation.
• Get enough sleep and manage stress with relaxation, breathing exercises, or hobbies.
• Wear supportive shoes and clothes that are easy to put on.
• Use assistive tools like jar openers or long-handled reachers if needed.

Diet and exercise

Eat a balanced diet with plenty of fruits, vegetables, whole grains, and healthy fats. Some people find processed foods or sugary snacks make inflammation worse, but there is no magic diet. Gentle, low-impact exercise such as cycling, swimming, or yoga can help without putting too much pressure on joints. If you are unsure what is safe, ask a physiotherapist or your healthcare team.

Mental health and emotional wellbeing

Living with a long-term condition can be stressful, and pain can affect your mood. It is completely normal to feel frustrated, sad, or anxious at times. If you notice these feelings lasting for weeks, talk to your doctor. And if you ever feel in crisis or that life is not worth living, reach out for help immediately — contact your local emergency number, a mental health helpline, or go to the nearest emergency department. You are not alone, and support is available.

Prevention

You cannot prevent psoriatic arthritis if you have the genes that make you likely to develop it. But if you already have psoriasis or early joints symptoms, seeing a doctor early can help start treatment before joint damage happens. Also, looking after your overall health can reduce flare-ups.

Vaccines

Most adults with psoriatic arthritis can have recommended vaccines such as flu, COVID-19, and pneumonia vaccines. However, you may need to avoid live vaccines if you are taking certain immunosuppressant medicines. Always speak to your doctor or pharmacist before getting any vaccine.

Screening programmes

There is no routine national screening program for psoriatic arthritis. But if you have psoriasis, your doctor should ask about joint symptoms at your regular check-ups. If you notice new joint pain or stiffness, mention it early — you do not have to wait for a scheduled appointment.

Complications

If left untreated

• It can cause permanent joint damage, making movement harder.
• Inflammation can affect other parts of the body, like the eyes or heart, if left active for years.
• Chronic pain and limited mobility can reduce quality of life and sometimes lead to depression.
• Untreated psoriasis patches may become more extensive or infected.

Long-term outlook

There is good reason to be hopeful. Treatments for psoriatic arthritis have improved a lot over recent years. Many people achieve good control of their symptoms and keep doing their daily activities and hobbies. When you follow your treatment plan, stay active, and get regular medical follow-up, most people can protect their joints and live well for many years.

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