Plaque Psoriasis

Plaque psoriasis: An immune-mediated disease that affects nearly 1 million Canadians1

Knee of a plaque psoriasis patient. Plaques extend from right above knee to directly beneath it

~90% of people with psoriasis have plaque psoriasis, characterized by…

Elbow of a patient showing raised, red areas of skin.
Raised, red areas of skin covered with a silver or white layer of dead skin cells1
Which may have more greyish, purplish, or brownish tones in people with non-Caucasian skin2
Scalp of a plaque psoriasis patient with dryness and scaling.
And can appear on any area of the body, but most often appear on the scalp, knees, elbows, trunk, and limbs1

These plaques are often itchy and sometimes painful. Plaques in certain anatomical areas—including the face, elbows and knees, scalp, genitals, and intertriginous areas (psoriasis in areas of skin-to-skin contact)—present particular treatment challenges.1

Canadian Survey Insights

Uncovering the impact of psoriasis symptoms

Psoriasis symptoms can range between mild, moderate, and severe. However, these symptoms aren’t just physical and can have a substantial negative emotional impact and affect quality of life as well.3

Results of a survey conducted by the Canadian Psoriasis Network and the Canadian Association of Psoriasis Patients*,4

When asked to select all the personal attributes experienced over the past few years, respondents selected the following attributes the most:

Negative effect
on daily life
Lack of
Interrupted or
lost sleep
Avoiding intimacy

*The Journey to Stability Survey was open from September 15 to November 8, 2017. Online surveys were completed by 286 English and 36 French respondents, with the majority (96.5%) being adults living with psoriasis. The survey findings only represent the experiences of Canadians who responded. There was no accompanying educational material provided to respondents, so any limitations in their own knowledge (e.g. about new treatments like biologics or biosimilars) were not addressed. In addition, sample bias is possible as people dealing with issues related to their psoriasis may be more apt to respond to such a survey rather than people who have achieved greater control over their condition.


  1. Canadian Dermatology Association. Psoriasis. Available from: Accessed February 17, 2023.
  2. Canadian Association of Psoriasis Patients. Psoriasis: Symptoms. Available from: Accessed February 17, 2023.
  3. Bhosle MJ, Kulkarni A, Feldman SR, et al. Quality of life in patients with psoriasis. Health Qual Life Outcomes. 2006;4:35.
  4. Canadian Association of Psoriasis Patients and Canadian Psoriasis Network. Psoriasis: Journey to Stability. Available from: Accessed February 17, 2023.

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