The possibility exists that severe inflammation can lead to cancer, but not all severe inflammation turns into cancer.
Inflammation can exist as a stimulus around normal cells, and some normal cells may undergo malignant changes when stimulated by inflammatory factors over time.
There are many inflammatory diseases commonly associated with cancer, such as ulcerative colorectitis, in which patients are more than ten times more likely to develop colorectal cancer than the general population after years of illness; and hepatitis B, in which China is a large country, and in which many hepatitis B patients eventually develop cirrhosis of the liver, and then cirrhosis of the liver develops into liver cancer in some of the patients.
However, not all inflammation will become cancerous. Overall, the probability of inflammatory cells becoming cancerous is still relatively small.