Clinical tools and screening: Psoriasis

Rates psoriasis severity by scoring redness, thickness and scaliness of lesions, combined with how much body surface is affected. Common in specialist clinics and trials. Further reading.

Patient‑completed tools that capture how severe or bothersome psoriasis symptoms are, often mirroring PASI or focusing on symptoms such as itch and pain.

Estimates the percentage of the body covered by psoriasis. Often calculated using “one patient hand = about 1% of body surface”.

Clinician’s overall rating of psoriasis severity using a simple scale (e.g. clear, mild, moderate, severe). Used in clinics and research.