Squamous cell carcinoma antigen is a kind of tumor indicator, not a specific indicator. Elevated squamous cell antigen is mainly related to head and neck tumors, cervical tumors, cervical cancer including lung squamous carcinoma, and is an important tumor marker, which is mainly expressed in the cell plasma of tumor cells and will be secreted to release into the blood, resulting in elevated squamous cell antigen in the blood, but not absolutely. For example, benign diseases, such as inflammation and some injuries may also be elevated to some extent. If it is persistently elevated or at a high level, it needs to be taken seriously and can be reviewed regularly, and further examination and clarification is needed if necessary.