The general blood test for prostate-related indicators is PSA or prostate-specific antigen, the first two generally refer to f-PSA (free prostate-specific antigen) and t-PSA (total prostate-specific antigen). A small ratio may be associated with inflammation, hyperplasia, etc. The ratio between the two is usually ≥0.16, if the value is <0.16, it suggests an increased risk of prostate cancer. In addition, e.g. prostatitis and prostate hyperplasia can lead to mild elevation of serum t-PSA, which can result in low values of f-PSA/t-PSA. Prostate disease must be improved with other tests for comprehensive diagnosis, such as ultrasound, rectal examination, MRI, puncture biopsy and so on. If there is an abnormality in the labs, don't panic first, seek medical attention in time, and proceed to the next step of treatment after confirming the diagnosis with other auxiliary tests.