Primary liver cancer often shows no obvious symptoms in its early stages. It may present symptoms similar to indigestion, hepatitis, etc. For example, there might be slight discomfort or pain in the upper right abdomen, aversion to oil, or loss of appetite. Generally, regular health check-ups are needed, including imaging studies of the liver such as ultrasound, CT, or MRI. Liver function tests and tumor markers such as alpha-fetoprotein (AFP) should also be performed. In most cases of primary liver cancer, AFP levels will be elevated. Combined with imaging studies, a preliminary diagnosis can be made. A definitive diagnosis requires liver biopsy or confirmation through pathology after surgery.