Mycoplasma does not cause cancer if it is not treated. Cancer is caused by multiple factors through multiple pathways. Clinical cancer-causing factors that have been clearly identified include chemical factors, including contact with and use of aromatic substances, consumption of moldy food, physical factors, including radiation exposure or injury, and viral infections, including human papillomavirus (HPV), which can lead to cervical cancer, EBV, which can lead to nasopharyngeal cancer, and Hepatitis B virus (HBV), which can lead to liver cancer, as well as other special bacteria, including Helicobacter pylori, which can lead to gastric adenocarcinoma and other digestive system diseases. Helicobacter pylori infection can lead to gastric adenocarcinoma and other digestive system diseases. In addition, there is a close relationship between the occurrence and development of tumors and heredity, so mycoplasma will not lead to cancer if it is not treated.