When it comes to itchy skin, it doesn’t creep us out or scare us, but it does give us heart palpitations. In the end, we have a psychological fear of skin itch. After all, when this skin itch appears, it is too unpleasant to have to scratch and will make the consequences even worse. For the treatment of itchy skin to do a good job, the most critical is the need to find out the specific causes of itchy skin, so as to target the treatment of. The causes of itchy skin are as follows: 1, neurodermatitis, which is the most common disease that causes itchy skin. Mostly occur in the back of the neck or its sides, forearms, thighs, calves and other places. 2, infectious dermatoses, which include viral dermatoses, such as chickenpox, measles, flat warts, etc.; bacterial dermatoses, such as impetigo, folliculitis, etc.; fungal dermatoses tinea capitis, ringworm, ringworm, ringworm, lichen planus, etc.; parasitic and animal dermatoses, such as hookworm dermatitis, schistosome dermatitis, runner’s rash, lice disease, mosquito bites, mite dermatitis, mulberry worm dermatitis, scabies, etc. 3, allergic skin diseases, like contact dermatitis, eczema, atopic dermatitis, atopic dermatitis, seborrheic dermatitis, drug rash, urticaria, etc., papular urticaria. 4, chronic nephritis, especially into the late stage (uremic phase), because the blood urotoxins and urea and other metabolites can not be excreted out of the body, but a large number of retention in the body, and with sweat out of the body surface, which is easy to cause generalized intractable pruritus, its itch unbearable. 5, physical skin diseases, such as prickly heat, polymorphic sun rash, sun dermatitis, frostbite, friction moss-like rash, etc. 6, herpetic skin diseases, such as herpes-like dermatitis, herpetiform aspergillosis, pregnancy herpes, etc. 7, hepatobiliary diseases, itching due to liver disease is mostly seen in hepatic sclerosis, cholelithiasis, bile duct tumor disease. 8, neurological dysfunctional skin diseases, such as neurodermatitis, pruritus, itchy rash, nodular itchy rash, pregnancy itchy rash, exudative discoid and mossy dermatitis, etc. 9, diabetes, about 10% of early diabetic patients will have generalized or localized pruritus, and more persistent, with the most serious symptoms in the vulva or anus. 10, blood system diseases, some blood system disorders can also cause itchy skin, such as iron deficiency anemia, more dry skin and varying degrees of skin pallor. 11, bile acid concentration is too high, bile acid in the blood when the concentration increases, will be deposited in the skin, resulting in severe itching of the skin. 12. Certain lymphatic system tumors, such as meat-like granuloma, Hodgkin’s disease, etc. or patients with myeloproliferative disorders, are often accompanied by generalized itching. The above are only the common causes of itchy skin symptoms, in fact, the diseases that cause itchy skin are far more than these. Once the itchy skin occurs, the first thing to consider is not to scratch to stop the itch, but to find the cause of the itchy skin first.