CK positive usually refers to immunohistochemistry CK positive, suggesting the possibility of malignant tumors, need to be combined with clinical symptoms, signs and symptoms for further diagnosis, some benign diseases may also lead to a slight increase in CK indicators. CK usually refers to cytokeratin, which is an important marker for tumor cells and mainly exists in epithelial tissues. Its main function is to maintain the integrity and continuity of epithelial tissues, and the detection of CK helps to diagnose malignant tumors; meanwhile, there are various subtypes of CK, and the clinical detection of the various subtypes also helps to understand the primary location of the cancer, and whether it has metastasis. In addition, not all CK positivity will be diagnosed as cancer, but may also be benign diseases, such as pneumonia, tuberculosis, chronic bronchitis, gastrointestinal diseases, gynecological diseases, urological diseases and so on. It is recommended that if the immunohistochemistry CK is positive, you should go to the hospital in time, and under the guidance of the physician, actively cooperate with the relevant examination and treatment, so as not to delay the condition. In daily life, pay attention to develop good dietary habits, more exercise to enhance immunity.