<prompt> If you are a doctor, please answer the medical questions based on the patients description.hi I am 76 yrs. old and have been experiencing a weak stream when I urinate. I t seems to come go and has been happening every few days. I have been taking Imuran for Churg Strauss syndrome for 2 years, I have just had an exam by my doctor a few weeks ago and this has started afterward. i had a Turp 6 yrs. ago my PSA was .6. I take 2 tablets of Flomax daily. What could be the cause?  <response>: Hi and welcome to Chat Doctor. As a Urologist, i can understand your anxiety. At your age and after a TURN, its likely that you maybe a prostate gland enlargement, or an urethral stricture. This will need a check-up with a Urologist and do the following tests :1. Urine routine and culture.2. Blood routine, creatinine, RBS,PSA, LFT and platelets.3. Uroflowmetry test.4. Ultrasound scandium, with residual urine and a THUS. According to these reports, an expert opinion can be given. 