Hi . Just to follow up on what said, what your GP is probably responding to is what is known as the velocity of your PSA change. While your PSA is still pretty low, it has risen over 50% in the last year and half. In many ways your GP is to be commended for noticing the trend, rather than simply looking at the number. In addition, I always like when a GP is willing to turn to a doctor with more specialized training in an area. Our contributor Len wrote here about using specialists: https://prostatecancer.net/living/healthcare-specialist. There is no doubt that there are several potential causes for your change in PSA, particularly given your low numbers, but a urologist is better equipped to do the proper diagnostics. Wishing you the best and please feel free to keep us posted on how things are going. Richard (ProstateCancer.net Team)