Generally speaking, prostate enlargement may cause an increase in the concentration of PSA in the blood, but the increase is not significant. Blood PSA is a prostate-specific antigen, which is mainly used as a specific tumor marker for detecting prostate cancer in the clinic. Generally, the concentration of PSA in the blood of a healthy person is not more than 4 ng/L, and a mild increase in PSA often occurs when there is prostate cancer or some other diseases. When prostate cancer is present, an abnormally high blood PSA test result may occur, but it is not the only factor. Prostatitis,, prostate hyperplasia, prostate massage, urinary tract infections, etc. may also lead to an increase in blood PSA, so whether or not prostate cancer is present cannot be based on PSA concentration as a single diagnostic basis. It is recommended to undergo further comprehensive examination in regular hospitals for relevant diagnosis and treatment.