Itching on the back is not necessarily related to the liver. If the itching is caused by yellow sclera of the skin, it is closely related to the functional status of the liver. If the itching is confined to a certain area of the back, there is not necessarily a direct relationship with the liver. When liver function is impaired, as jaundice rises, causing jaundice in the skin and sclera, bilirubin can bind to peripheral nerves and cause peripheral neuritis, thus inducing a series of symptoms such as itching. When itching occurs and cannot be effectively resolved by scratching or snapping, it can be determined by liver function tests. If the bilirubin is normal it will not cause itching, if the bilirubin is elevated more, it can cause the corresponding symptoms. When the liver function is normal, then look for the cause of itching behind, whether it is its own skin lesion, or local neuritis lesion, and then take appropriate treatment measures after clarifying the cause. If the itching is caused by neuritis, it can be improved by hormones and vitamin B. If it is a fungal skin infection or bacterial infection, the symptoms can be controlled and improved by anti-fungal and anti-bacterial drugs.