The reasons for elevated prostate specific antigen: First, prostate cancer, when malignant tumor of prostate occurs, it can cause the prostate specific antigen to overflow into the blood to increase, this is through the cut can be found in the prostate specific antigen elevated. Often the elevation is greater than 10 ng / L, so for more than 10 ng / L prostate-specific antigen, all need to carry out prostate puncture biopsy to rule out the presence of prostate cancer; Second, if the patient has had urethroscopy, cystoscopy, or transanal prostate fingerprinting within a week of the patient, it can cause a transient elevation of the prostate-specific antigen. However, the range of elevation is usually between 4-10ng/L. It is recommended that patients who have had the relevant operation within a week should undergo a review at a later date. If the review is normal, no special treatment is needed. If the review is still elevated, it is necessary to carry out prostate puncture biopsy to rule out the presence of malignant tumors; Third, for patients with prostatitis or prostate hyperplasia, prostate-specific antigen can be mildly elevated, but the range of elevation is often less than 10 ng/L. The prostate-specific antigen is usually elevated in the range of 4-10 ng/L in prostate ultrasound examination. At the same time, the prostate ultrasound examination can be seen to increase the size of the prostate, and the prostate fluid examination can be seen to be filled with white blood cells, which can be diagnosed as prostatitis. It is recommended to wait for the complete healing of the inflammation and then review the prostate-specific antigen, or perform anal fingerprinting to find out whether there is a hardening of the prostate.