Itchy skin is very complex factors, the occurrence of itchy skin first of all to exclude the dryness of the skin of the whole body. In the winter and spring season, the dry climate may cause itchy skin, in addition, some people take too many baths, bathing with hot water temperature is too strong, the use of alkaline soap caused by dry skin, can also cause itching, and some older people, due to the nutritional state of the skin becomes poor, sebum secretion is reduced, can also cause dry skin leading to itching. In addition, certain people exposed to allergic pollen, or plants can lead to itchy skin, and certain parasitic infections, such as scabies, may also lead to itchy skin. In addition, certain systemic diseases, such as kidney disease, uremia, diabetes, and leukemia, may cause increased itching of the skin, and attention must also be paid to whether there are neuropsychiatric factors, such as excessive mental tension, anxiety, depression, etc., are closely related to itching of the skin. Therefore, itchy skin must be alerted when it occurs and consult an experienced doctor at the hospital to seek guidance on the next step of treatment.