The pruritus is a kind of skin disorders with skin itching caused by primary lesions. The major causes are skin atrophy, dry skin by degradation of sebaceous gland and sweat gland, or too frequent washing and bathing and use excess stimulated cleaning detergents, or the big change of temperature and humidity at the transformation of autumn and winter, drinking wine or taking hot and spicy food, even some internal diseases such as diabetes, uremia etc. The senile people are easy to get international secretion disorder and poor blood circulation due to spirit deficiency of kidney. If the micro-circulation obstacle is occurred, the cell will be in shortage of wetting, the skin will be dry and, itch. At the transformation of seasons, temperature difference will be large, it will be more itching. It will be much inconvenient for elderly people. So, from Chinese medicine viewpoint, it will be a very good treatment guideline for this group of people.