What is psoriasis?
Psoriasis is a long-term (chronic) condition in which skin cells are produced much faster than normal. Usually, skin cells are made and shed over about a month, but in psoriasis this process speeds up to just a few days. Because the cells are not shed fast enough, they build up on the surface, forming the thick, raised, scaly patches that characterise the condition.
Psoriasis is thought to be related to a problem with the immune system, which mistakenly speeds up the skin's renewal. It is not contagious — you cannot catch it from or pass it to someone else. It often follows a pattern of flare-ups, when symptoms worsen, and quieter periods. Although there is no cure, psoriasis can usually be controlled well, and understanding it helps people manage it effectively.
Symptoms and types
The appearance of psoriasis varies depending on the type and where it occurs, and it can look different on different skin tones. The most common form is plaque psoriasis. Common features include:
- •Raised patches of skin, often covered with silvery-white scale
- •Patches that may appear red, pink, purple or brown depending on skin tone
- •Itching, soreness or a burning sensation in affected areas
- •Commonly affected areas: elbows, knees, scalp and lower back
- •Dry, cracked skin that may sometimes bleed
- •Changes to the nails, such as pitting or thickening, in some people
Triggers
Psoriasis tends to flare up in response to certain triggers, which vary between individuals. Identifying and managing your own triggers is a helpful part of keeping it under control. Common triggers include:
- •Stress
- •Skin injury, such as cuts, scrapes or sunburn
- •Certain infections, such as throat infections
- •Cold, dry weather
- •Some medications
- •Smoking and heavy alcohol use
Treatment
While psoriasis cannot be cured, a wide range of treatments can control it well, and treatment is usually tailored to the type and severity. For many people, treatments applied to the skin are the first step, including moisturisers to reduce dryness and scaling, and prescribed creams and ointments that slow skin cell growth and reduce inflammation.
For more widespread or stubborn psoriasis, other options include light therapy (controlled exposure to ultraviolet light under medical supervision) and, for more severe cases, medicines that work throughout the body to calm the overactive immune response. A doctor or dermatologist can build a treatment plan suited to the individual, often combining approaches and adjusting them over time as needed.
Living well with psoriasis
Living with psoriasis involves both managing the skin and looking after wider wellbeing. Keeping the skin well moisturised, identifying and avoiding personal triggers, and using treatments as prescribed all help keep flare-ups under control. Gentle skincare, avoiding harsh products, and not smoking or drinking heavily support healthier skin.
It is also important to recognise that psoriasis is more than skin deep. Because it is visible, it can affect confidence, mood and quality of life, and it is associated with a higher risk of low mood and some other health conditions, including a form of arthritis called psoriatic arthritis that causes joint pain. Looking after mental wellbeing, seeking support when needed, and mentioning any joint symptoms to a doctor are all part of managing psoriasis well. With the right care, most people keep it well controlled and live full lives.
Psoriasis and psoriatic arthritis
An important aspect of psoriasis that people are not always aware of is its link to a form of joint disease called psoriatic arthritis. This affects a proportion of people with psoriasis, causing inflammation in the joints that leads to pain, stiffness and swelling. It can affect any joint, and sometimes also causes swelling of the fingers and toes or pain where tendons attach to bone.
Psoriatic arthritis can develop before, after or alongside the skin symptoms, and its severity does not always match the severity of the skin condition — someone with mild skin psoriasis can still develop significant joint problems. Because catching and treating it early helps protect the joints from lasting damage, it is important to mention any joint pain, stiffness or swelling to your doctor if you have psoriasis.
The good news is that, like skin psoriasis, psoriatic arthritis can be treated, and several effective options exist to control inflammation and protect the joints. A doctor can assess any joint symptoms, confirm the diagnosis, and recommend treatment, which may involve a specialist. Being aware of this link means you can seek help promptly rather than dismissing joint symptoms.
The emotional side of psoriasis
Because psoriasis is a visible, long-term condition, its impact often goes beyond the physical. Many people with psoriasis find it affects their confidence, self-image and emotional wellbeing, particularly when it appears on visible areas or during flare-ups. Research has linked psoriasis with a higher risk of low mood and anxiety, so this side of the condition deserves the same attention as the skin itself.
It can help to remember that psoriasis is a medical condition, not a result of poor hygiene, and that it is not contagious — points that can ease some of the social worry people feel. Good control of the physical symptoms often improves confidence too, which is one more reason effective treatment is worthwhile.
If psoriasis is affecting your mood, confidence or quality of life, it is worth talking to your doctor, who can offer support and treatment. Connecting with others who have the condition, through support groups or patient organisations, helps many people feel less alone. Looking after emotional wellbeing is a genuine and important part of living well with psoriasis.