Hello and thanks for your enquiry,

Unfortunately, a practice nurse cannot do this. It has to be a medically trained doctor. Back pain is very common in the general population, and GP's will assess this first as a muscle skeletal issue. Usually rest and painkillers will help. Sometimes a physiotherapy referral is suggested. If back pain is persistent then a GP may request xray or a MRI scan to assess the spine.

If you are concerned about your prostate cancer risk, then do discuss it further with a doctor. You can ask to see another GP at the surgery if you wish. You may wish to read about the PSA test on the website of Prostate Cancer UK

I hope that this helps,

Best wishes,