Urinary problem. Me in this issue. sir.

Sir my father is suffering from increased urination and some burning feeling while urinating and I consulted the doctor ...he suggested to do total 7 tests..1)Haemogram 2)CUE 3)Urine culture 4)serum creatinine 5)HBA1C 6)PSA 7) ultrasound scan of abdomen and pelvis.. All the tests are done but in Ultrasound scan One impression found sir I;e Urinary bladder thickened & trabeculated. PVR -500ML Prostate enlarged in size, Vol 29 cc Impression : GRADE 1 PROSTATOMEGALY WITH SIGNIFICANT PVR-URINARY RETENTION .. So finally doctor suggested for CYSTOSCOPY and GIVEN MEDICINE FOR 15 DAYS AND MY FATHER IS LITTLE BIT NERVOUS TO TAKE THAT TEST AND ASKING CAN It BE CURABLE WITH THE MEDICINE...IR WE MUST GO FOR CYSTOSCOPY test ... please help me in this issue..Sir..