As your father is 76 yrs old,he has to be excluded from Prostate Cancer
.Please get Prostate Specific Antigen(PSA) test done with the advice of your Urologist
Based on the PSA report,treatment can be decided.
There is Medical treatment for Benign Prostatic Hypertrophy(BPH
).It will be tried initially in most patients.
If there is no response from medical treatment,Surgery will be planned.
Consult your Urologist and take his opinion.
All the best