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Overview
Psoriasis is an immune condition.
It can affect joints.
When to get medical care
Call 911Not an emergency.
Get care todayWidespread red skin or fever.
See a doctor soonNew patches or joint pain.
Causes
Caused by an overactive immune system.
OwieClear has pages on 2 conditions that can cause thick, scaly, silvery patches. Each shows how soon to get care.
Common causes
- PsoriasisSee a doctor if it doesn't get better
A long-term immune condition that causes thick, scaly, silvery patches, often on the elbows, knees, and scalp.
Less likely causes
- Mycosis fungoides and Sézary syndrome (skin T-cell lymphoma)See a doctor if it doesn't get better
Lymphomas of T cells that show up in the skin.
What you can do at home
- Moisturize.
- Get some sun.
Medicines
Creams, light therapy, or biologics.
At the doctor
Diagnosed by exam.
Questions you may be asked
- Joint pain
The exam
A skin exam.
Tests
- Biopsy if unclear
Prevention
Manage triggers.
- Reduce stress
- Don't smoke
Check your symptoms
Most symptoms have more than one possible cause. The symptom checker looks at all of your symptoms together, plus your age, and shows how soon to get care.
Sources
Last updated 2026-11-13.