1.What is pruritus senileis? Pruritus senileis is a common skin disease in the elderly, with clinical symptoms of pruritus without a typical rash. 2.What are the characteristics of pruritus senileis? Geriatric pruritus is often manifested as follows: the onset of pruritus can be found in various parts of the body, with paroxysmal itching, the location is variable, and the degree of itching varies, mostly in the evening, affecting the patient’s sleep. The skin is mainly dry, with bran-like flaking on the surface. Scratches and blood scabs are often seen on the skin due to scratching, and eczema-like changes and pigmentation may also be present. Patients with itchy skin are often thought to be caused by unhygienic skin, often scalding every day, the result is that the more you wash the more itchy, the more itchy the more you wash, forming a vicious circle. Drinking alcohol, impatience and anxiety and other adverse emotional changes, hot and cold stimulation and even some psychological implication can make the itchy skin aggravated. 3, geriatric pruritus is how to happen? The etiology of geriatric pruritus is complex, and its pathogenesis is currently believed to be mainly related to the following factors: (1) degenerative skin changes: with the growth of age, build a variety of skin cells and functional changes, eventually leading to physiological changes in the elderly skin dryness, texture deepening, reduced elasticity and degenerative changes, these changes can reduce the ability of the elderly to adapt to changes in the surrounding environment, susceptible to temperature, humidity and other environmental factors and bad chemicals. These changes can reduce the ability of the elderly to adapt to changes in the surrounding environment and make them susceptible to temperature, humidity and other environmental factors and adverse chemical or physical stimuli that can cause or aggravate itching. (2) Pruritus can be a skin symptom of many visceral diseases, the most important of which are liver disease, renal failure, hyper- or hypothyroidism, ischemic anemia, tumors of various tissue sources, etc.; diabetes is also often an important cause of pruritus in the elderly. (3) Allergic factors Some studies have suggested that ingested allergens and inhaled allergens are associated with pruritus senileis. (4) Neuro-psychiatric factors: psychological factors or mental factors such as anxiety, depression, trauma, etc. can cause pruritus, and aggravate or reduce with good or bad mood. 4. How to treat pruritus senileis? For the special characteristics of the elderly skin itself, a reasonable choice of moisturizers, choose the correct topical or oral drugs, can effectively prevent and control the occurrence of pruritus. In addition, physical examination and laboratory tests, including thyroid, liver, kidney, complete blood count and classification and chest X-ray, should be performed according to the complete medical history to find out the internal diseases causing pruritus and treat them.