PSODEEP 1 is a descriptive digital interview study where we intend to include at least 900 individuals. Individuals with known psoriasis or known psoriatic arthritis will access the digital interview via a QR code distributed via their rheumatology or dermatology department using their smartphones. Data on answers results are stored digitally and can be accessed parallel to recruitment. Questions focus on following fields (all self reported): background information (age/sex), disease duration, disease course/fluctuation, disease diagnosis as given by MD, disease treatment, disease severity, disease classification, disease triggers, screening of psoriatic arthritis (questions derived from PEST questionnaire), Koebner occurence, variability in Koebner over time, deep-Koebner occurence and variability in Deep-Koebner over time.