There are many causes of itching on the body that do not necessarily indicate the presence of a disease, and there are no predictions of ten major diseases. It may just be that the skin is too dry and not cleaned properly, causing bacteria to breed on the surface of the skin, or it may be that the skin nerves are stimulated by excessive mental tension, or when the skin comes into contact with allergens, or after inhaling or eating substances that cause allergies, the patient will have an allergic reaction, usually manifested as itchy skin, followed by papules, red spots, blisters and other symptoms. Symptoms usually disappear after paying attention to hygiene, relieving emotions and staying away from allergens. In addition, itchy skin may also occur during pregnancy due to hormonal influences. However, if the itching symptoms on the body for a long time, also consider suggesting the existence of skin diseases or other organic diseases, pay attention to this process to avoid scratching the skin to avoid breakage, infection, timely access to medical care, clear causes after targeted treatment. Common causes and treatments 1, seborrheic dermatitis: usually related to genetics, infection germs, or excessive sebum secretion and other reasons, the lesions are mostly erythematous and accompanied by flakes and itching, so it may suggest the existence of seborrheic dermatitis. It is recommended to choose tacrolimus cream application or oral vitamin B6 under the guidance of a doctor. 2. eczema: due to abnormal autoimmune function, endocrine abnormalities and other internal factors and external environmental stimulation, patients usually feel intense itching of the skin, accompanied by redness, swelling, blisters and even oozing. It is recommended to use compound dexamethasone acetate cream and mometasone furoate cream to relieve the itching, and the blisters are treated by a doctor when they are large; 3. Peripheral neuritis: mostly caused by infection, autoimmune abnormalities or abnormalities in nutritional metabolism, and there are commonly diabetic patients complicated by peripheral neuritis. Patients with mild cases may be self-conscious of itchy skin, and most patients usually have a self-conscious sensation of pins and needles, burning or ants crawling through the skin. Patients are advised to take oral vitamin drugs, including vitamin B6 and vitamin B12, as well as intravenous drip drugs, such as dexamethasone and immunoglobulin. 4. Hyperthyroidism: Higher secretion of thyroid hormones due to genetics, own chronic diseases, or other reasons prompted by the thyroid gland. Patients may have symptoms such as itchy skin, emotional instability, excessive sweating, and weight loss. The presence of these symptoms mostly suggests that patients may have hyperthyroidism. Patients are advised to seek medical attention, take medication as prescribed by the doctor, and take surgical treatment if necessary; 5. Hepatitis: Mostly due to viral infection or drug immunity, the liver is infected or damaged, thus hepatitis occurs. The skin lesions show yellow sclera and itchy skin, which may indicate hepatitis. It is recommended that patients undergo liver function tests and then take liver-protective drugs and anti-fibrotic drugs as prescribed by the doctor, and if necessary, surgery can be considered in serious cases; 6. Cholangitis: mostly due to biliary stasis, biliary tract infection and other reasons, the lesions show jaundice and are accompanied by itchy skin, which can be considered as cholangitis according to the symptoms. Timely treatment with anti-infective and antispasmodic drugs and surgery if necessary; 7. Hysteria: a mental disorder caused by mental or psychological factors, patients may have pruritus with other reactions such as convulsions and dyskinesia at the onset, and other external symptoms are more suggestive than pruritus. Mainly psychological treatment, as well as symptomatic drug treatment, such as diazepam, etc.; 8, malignant tumors: such as early stage of pancreatic cancer patients due to bilirubin stimulation or bile accumulation in the body, some patients will have pruritus, in addition to other tumors may also involve the skin itch. It is recommended to take surgery, chemotherapy, radiotherapy, etc. in time according to your situation. It is recommended that patients should pay attention to personal hygiene, keep the skin moist and wash hands regularly to avoid infection at the ruptured area when scratching. For allergic patients, stay away from contact with allergens after clarifying them and take anti-allergy drugs as prescribed by the doctor. At the same time, patients who are clear what kind of disease is itching on the body should actively cooperate with the doctor for treatment to avoid aggravation of the disease.