The document discusses the poor living conditions of cancer cells. It states that the life of a cancer cell is complex, with metabolic stress both inside and outside the cell. Cancer cells have abnormal DNA transcription and hypermethylated genes. Their energy production and biosynthesis abilities are impaired. They also have imbalanced ions and issues with nuclear and cytoplasmic membranes. Cancer cells live parasitically and are immortal and continuously proliferative, with multi-antigenic characteristics. All of these problems contribute to the complicated and problematic nature of cancer cell proliferation.