To determine whether itchy skin is the first symptom of cancer, a variety of ancillary modalities such as tumor marker tests, local skin tissue sampling, ultrasound, CT, and MRI can be used to determine whether cancer is present. In most cases itchy skin is not the first symptom of cancer. Cancer is a localized tumor growth caused by abnormal proliferation of tissue cells, which usually results in abnormal elevation of local tissues, subcutaneous bleeding, pain, etc., and systemic symptoms such as fever, loss of weight, anemia, etc. In rare cases, itching is accompanied by skin itching. Very few itchy skin when accompanied by obvious skin or sclera yellow staining and other symptoms, can be considered to be cancer-induced jaundice symptoms, need to carry out the total blood bilirubin and tumor markers test. If you are worried about the presence of malignant tumors or family history, it is recommended that you go to the hospital regularly for tumor-related tests, so that early diagnosis and early treatment can be carried out to avoid serious consequences such as tumor metastasis or spread.