PSA in patients with benign prostatic hyperplasia usually does not exceed 4 ng/ml. PSA is a good prostate tumor marker and can be elevated in patients with prostatic hyperplasia and prostate cancer, but with different manifestations and changes. 1. Prostatic hyperplasia: In patients with prostatic hyperplasia, PSA is elevated to a lesser extent, with a high percentage of free PSA, and the degree of elevation tends to correlate positively with prostate volume. 2. Prostate cancer: PSA is usually more than 4ng/ml in patients with prostate cancer, with the progression of the disease, PSA tends to rise linearly, and with the beginning of treatment and the efficacy of the treatment, PSA gradually decreases. Patients with elevated PSA need to consult a doctor in time to clarify the cause of the disease through detailed examination and receive timely treatment.