Heterogeneous cells are cells that differ from normal cells in size, structure, contents, etc. The presence of heterogeneous cells indicates that there may be lesions in the body. Normal cells under the action of genetic mutation, viral infection, toxic substances, etc., may undergo changes in morphology, size, cell contents, etc., which are different from the normal cell morphology and are called heterogeneous cells. Heterocytes can be categorized into mild, moderate and severe heterocytes according to the difference in heterocytosis. The presence of heterogeneous cells in the body indicates that there may be lesions somewhere in the body, even cancerous, and further examination should be done in the hospital, such as cellular immunology examination, tissue biopsy, etc., to clarify the cause of the appearance of heterogeneous cells, and targeted treatment.