There is no clear clinical definition of how much elevated PSA is likely to be prostate cancer. Usually when the total serum PSA is greater than 4.0ng/ml, then there may be a risk of prostate cancer, but it may also be other non-malignant diseases. Total serum PSA<4.0ng/ml is normal in healthy people, and if it is greater than 4.0ng/ml, it suggests the risk of prostate cancer. However, PSA test is not used as a specific biomarker for prostate cancer, and PSA values can be elevated in benign prostatic hyperplasia, prostatitis, and other non-malignant diseases. Therefore, due to the many factors affecting the increase of PSA value, when there is an abnormality in the index, you should consult a professional doctor in time, do not blindly interpret the test results on your own, and should carry out other tests under the guidance of the doctor, such as rectal fingerprinting, prostate puncture biopsy, and so on.