Psoriasis requires skin care based on the following aspects: 1. Both psoriasis vulgaris and erythrodermic psoriasis can have the clinical manifestation of flaking. 2, topical drugs for psoriasis such as glucocorticoids, retinoid drugs and drugs such as carbostriol and tacalcitol all have different degrees of impact on the epidermal barrier function. 3.Oral retinoic acid drugs can cause dryness and flaking. 4.Phototherapy can cause dry skin. 5.In particular, the latest research shows that certain microorganisms on the skin surface do not cause abnormal skin immune response on the normal skin surface, but when the skin barrier function is damaged, the microorganisms enter the dermis and can induce the immune response of the organism. Although the pathogenesis of psoriasis is not very clear at present, one thing is certain: the disease is an immune dysfunctional skin disease, therefore, the disruption of the epidermal barrier function is likely to induce or aggravate psoriasis. It can be seen that whether from the perspective of psoriasis treatment, counteracting the side effects of drugs, or preventing relapse of the disease – the basis is moisturizing skin care. How to use: 1.When there are skin lesions, use moisturizer first, and then apply the drug topically after 5-10 minutes; 2.When combined with phototherapy, use moisturizer after phototherapy first. 3.After the lesions have subsided, you can stop using the drug (or gradually stop using it in about 2 weeks), but the moisturizer can be applied for a long time – use the moisturizer all over your body after bathing every night, especially in autumn and winter.