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Diagnostic tools

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Measuring psoriasis and psoriatic arthritis

What's used to monitor psoriasis and psoriatic arthritis?

When you develop a condition such as psoriasis or psoriatic arthritis, you may wonder once the diagnosis is made, how severity is assessed and how effectiveness of treatments (efficacy) are measured. This is particularly important when deciding to change a treatment.

There are a number of ways your healthcare provider (HCP) will assess your psoriasis and psoriatic arthritis and may include the following:

Measuring psoriasis

Measuring psoriatic arthritis

Some of these measurement tools, may only be used in specialist settings or for research trials.

Most are used to assess severity and to see if a treatment has improved the condition and symptoms. 


Source references:

  • International Psoriasis Council: Psoriasis Measurement Tools [accessed 1 October 2020]
  • Tucker LJ, Coates LC, Helliwell PS. Assessing Disease Activity in Psoriatic Arthritis: A Literature Review. Rheumatology and therapy, 2019 6(1), 23–32.