Itchy skin can be caused by contact dermatitis, psoriasis or eczema, etc. The itching time can be long or short, and can be relieved or alleviated by general therapy, topical medication or internal medication. 1 contact dermatitis: need to find and remove the cause as soon as possible, while avoiding all kinds of external stimuli; acute need to carry out cold wet compress therapy, such as boric acid solution and other wet compresses; to be the disappearance of exudate, can be used externally with glucocorticoid drugs, such as mometasone furoate cream, etc., and antihistamine, such as cetirizine, etc., when itching intensely. 2. Psoriasis: usually available moisturizers to strengthen the skin barrier protection, external use of vitamin D3 derivatives such as carbotriol can also have significant therapeutic effects; serious need for the systematic use of immunosuppressive drugs such as methotrexate, vinblastine and other drugs. 3. Eczema: acute exudate can be used first boric acid solution cold wet compresses, astringent, anti-inflammatory, chronic can be used halometasone ointment, mometasone furoate ointment and other drugs. Severe itching affects sleep can choose antihistamines such as ebastine. Body intense itching, avoid scratching, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor’s medication, and actively treat the original disease.