<s>[INST] Hello Doctor,My dad was operated for prostate cancer two years ago and the recent psa reading is 0.02 (previous readings were 0.01). Is the higher psa this time a cause of concern.?Also, recently, he has been facing burning sensation and difficulty in passing urine. Please help [/INST] hi, in my opinion the new PSA is within normal limit. a minute change in it is not a matter of concern. the recent symptoms may be due to the ureteric stricture, the most probable cause. meet ur urologist he will do a retrograde cystourethrogram or a cystoscopy to find out the cause of obstruction. </s>