Раз в неделю.А еще почитайте здесьhttp://psoriazmed.ru/yablochniy-uksus-pri-psoriaze.htmlhttp://psoranet.org/topic/2799/http://ru.wikihow.com/%D0%B8%D1%81%D0%BF%D0%BE%D0%BB%D1%8C%D0%B7%D0%BE%D0%B2%D0%B0%D1%82%D1%8C-%D1%8F%D0%B1%D0%BB%D0%BE%D1%87%D0%BD%D1%8B%D0%B9-%D1%83%D0%BA%D1%81%D1%83%D1%81-%D0%BF%D1%80%D0%BE%D1%82%D0%B8%D0%B2-%D0%BF%D1%81%D0%BE%D1%80%D0%B8%D0%B0%D0%B7%D0%B0