The incubation period of primary liver cancer is usually around 3 months to 6 months, and sometimes 1 to 3 years, which is related to the difference of patients’ physique. The development of primary liver cancer is mainly caused by low differentiation of liver cells, and it is often seen in people who often consume pickled and moldy food. Once liver cells become cancerous, there may be no obvious symptoms in the early stage, and after 3 to 6 months of continuous development, it is possible that the patient may develop low-grade fever, jaundice, and pain in the right side of the abdomen, and other manifestations. In some primary liver cancers, the liver lesions will be slower and may develop only after a latent period of 1 to 3 years. The malignant degree of primary liver cancer is relatively high, and there will be a latent period before the onset of the disease. Normally, it is necessary to pay attention to light diet, and once symptoms such as fatigue and loss of appetite occur, it is necessary to carry out abdominal ultrasound or liver pathological biopsy in time to make a clear diagnosis, so as to achieve early detection and early treatment.