hello Thanks for query Based on the facts that you have posted your grand father has Enlarged Prostate and a self indwelling per urethral catheter has bee passed to drain out urine from bladder .He has developed symptoms of prostatitis . It is very common to get catheter induced infection in bladder and prostate giving rise to causing burning urination and refractory UTI . In such a situation it is always advisable to drain out bladder continuously by putting Supra Pubic Catheter (SPC)where a self retaining indwelling catheter is passed in bladder through a small hole made in anterior abdominal wall . This is a more safe and easy method to drain urine and avoids getting infection which can be kept for months together without any discomfort ,infection and burning that patient gets from per urethral catheter in addition to of making patient ambulatory . Dr.Patil.