The diagnostic criteria for prostate enlargement generally include clinical symptoms, physical examination and prostate ultrasound. Patients with prostatic hyperplasia may experience urinary frequency and urgency as well as difficulty in urination, weakness of urine, and thinning of the urine line. The physical examination includes an examination of the external genitalia, which can rule out diseases such as urethral stricture. Rectal palpation may also be performed, which is one of the most important means of diagnosis of prostate enlargement, and through which the volume of the prostate can be clarified. Patients can also undergo ultrasound of the prostate, which is generally recommended for transrectal ultrasound, and transabdominal ultrasound, which can also assess the size and volume of the prostate. The criteria for prostate enlargement can be consulted with the relevant specialized doctors, and timely consultation is required when uncomfortable symptoms occur.