To assess the benefit of the Avène hydrotherapy in subjects with pruritic plaque psoriasis

• To assess the benefit of the Avène hydrotherapy in subjects with pruritic plaque psoriasis in the:

  • Improvement of pruritus
  • Improvement of psoriasis severity
  • Improvement of quality of life
  • Change of pruritus and psoriasis biological markers
  • Intake/application of treatments and skin care products for psoriasis and pruritus management, evaluated during a follow-up period

• To assess the time to pruritus relapse evaluated in subjects with pruritic plaque psoriasis, during the period following the Avène hydrotherapy (for the hydrotherapy group only)

• To assess the global efficacy of the Avène hydrotherapy in pruritic plaque psoriasis, according to subjects' and investigators' opinion (for the hydrotherapy group only)

• To assess the global cutaneous tolerance of the Avène hydrotherapy in subjects with pruritic plaque psoriasis (for the hydrotherapy group only)

Inclusion Criteria:

• Subject with plaque psoriasis
• Subject with moderate to very severe chronic pruritus whose NRS score ≥ 4, (on a scale ranged from 0 to 10)
• Subject with chronic pruritus, i.e. for at least 6 weeks, due to plaque psoriasis

Exclusion Criteria:

• Subject with erythrodermic psoriasis, pustular psoriasis or palmoplantar keratoderma
• Subject with any other type of pruritus, not related to plaque psoriasis
• Subject with an acute, chronic or progressive disease other than plaque psoriasis which could be the origin of the pruritus
• Biotherapy, Phototherapy or PUVAtherapy treatment
• Psoriasis treatment by LASER
• Systemic or topical treatment taken/applied for psoriasis or pruritus management established or modified since the selection visit or planned to be established or modified between the inclusion visit and the end of the hydrotherapy