Impact of Hand Rub Placement on Patient Trust and Disease Stigma

Inclusion Criteria: For Patients: * Aged 18 years or older. * Diagnosed with psoriasis and receiving treatment at the designated psoriasis specialty outpatient clinic during the study period. * Legally capable of signing the informed consent form and cognitively able to understand and complete the questionnaire (independently or with assistance from family members). For Physicians: * Hold a registered practicing qualification in the Dermatology Department of Huashan Hospital Pudong Branch and are qualified for independent outpatient consultations. * Scheduled to continuously undertake outpatient work in the designated consultation rooms during the study period. * Voluntarily sign the informed consent form for behavioral observation. Exclusion Criteria: For Patients: * Severe visual, hearing, or speech impairments leading to basic doctor-patient communication barriers. * Diagnosed with psychiatric disorders (e.g., schizophrenia, severe depression) that, as assessed by a specialist, may interfere with the authenticity of the questionnaire responses. * Presenting with a clinical state requiring emergency treatment during the visit, such as acute infection of skin lesions or generalized pustules. For Physicians: * Non-permanent practicing staff of the hospital, such as visiting physicians or rotating medical students. * Unable to independently perform hand hygiene procedures due to physical/limb dysfunction.