Patients with psoriasis are advised to try to choose alkaline and less irritating detergents to take a bath, and if there is no obvious dirt on the surface, it is even recommended to take a bath with water, and some patients can choose herbal lotions to take a bath, and it is clinically believed that herbal medicine bath is a very important means of treating psoriasis. In addition, it should be emphasized that more moisturizing emollients must be used after bathing. Psoriasis is usually accompanied by impaired skin barrier function, and topical moisturizing emollients, such as petroleum jelly, silicone oil cream and vitamin E cream, can promote the repair of skin barrier function and improve the symptoms of psoriasis.