Psoriasis refers to psoriasis, which is an immune-mediated, chronic, relapsing, inflammatory, systemic disease induced by a combination of heredity and the environment. psoriasis in a 12 year old boy can be improved by topical medications, oral medications, biologics, or physical therapy. 1. Topical medications: Topical medications generally include retinoic acid drugs, vitamin D3 derivatives (carbotriol or tacalcitol), calcium-modulated phosphatase inhibitors, etc., which have significant efficacy, and a variety of keratin-contributing agents (tar preparations, salicylic acid ointment, etc.) can also be used. 2. Oral drugs: systemic drug therapy immunosuppressants are mainly applied to moderate to severe plaque-type, erythrodermic, pustular and arthropathic psoriasis, commonly used methotrexate, cyclosporine, etc.; Vitamin A acid drugs are mainly applied to plaque-type, pustular and erythrodermic psoriasis; patients with obvious infections or pan-emergent pustular psoriasis should be treated with antibiotic drugs. 3. Biologics: Biologics are indicated for patients with moderate to severe psoriasis and/or psoriatic arthritis for whom conventional systemic therapy is ineffective or poorly tolerated, including anti-TNF-α, anti-IL-12/23, anti-IL-17A monoclonal antibody, and monoclonal antibody against IL-17A receptor. 4. Physical therapy: patients can also be improved by photochemotherapy or UVB phototherapy. For 12-year-old boys with psoriasis patients, it is recommended to go to a regular hospital for examination in a timely manner, standardized treatment under the guidance of a professional doctor, and medication as prescribed by the doctor.