Psoriasis
Psoriasis is a long-term condition that speeds up skin cell turnover, causing thickened, scaly patches. Here's an overview and when to seek care.
A long-term condition with scaly patches
Not contagious — related to skin cell turnover
Often well managed so flares are milder
Can be linked to joint symptoms — tell your doctor
Psoriasis is a common, long-term skin condition in which skin cells build up faster than usual, forming thickened patches that are often scaly and can be itchy or sore. It tends to come and go, and while it can't be cured, it can usually be managed well.
What it looks like
The most common form causes raised patches (plaques) with a silvery-white scale, often on the elbows, knees, scalp, and lower back — though it can appear elsewhere. Psoriasis varies a lot from person to person, from a few small patches to more widespread involvement.
Related readingEczema & dermatitisHow another common itchy-skin condition compares.Common triggers
Flare-ups can be influenced by stress, skin injury, infections, cold or dry weather, and certain medications. Psoriasis is also linked to overall health, so your physician may consider the bigger picture, not just the skin.
When to seek care
It's worth being assessed if patches are persistent, uncomfortable, spreading, or affecting your confidence or daily life — or if you also notice joint pain or stiffness, which can sometimes accompany psoriasis. Your iCollab physician can assess it and coordinate dermatology input where appropriate.
Have a concern you'd like looked at?
Book with an iCollab physician, or ask at the walk-in clinic.
A closer look
As you scroll, each part highlights on the diagram. This is general education, not a diagnosis.
Surface
In psoriasis, skin cells build up too quickly at the surface, forming thick, scaly patches (plaques).
Skin barrier
The rapid turnover disrupts the normal barrier, leading to the characteristic raised, flaky areas.
Inflammation
Psoriasis is driven by an overactive immune response causing inflammation — it's not contagious and it's not caused by poor hygiene.
Deeper layers
Because it's an immune-related condition, management looks at the whole picture, not just the surface.
Psoriasis — FAQ
Is psoriasis contagious?+
Can psoriasis be cured?+
Is psoriasis linked to other health issues?+
More in Dermatology
Educational guides and related care from the iCollab dermatology team.