My doctor said it should take 3 months to come back down.....
Many things can cause a PSA to rise.
Inflammation of any kind, such as from an infection, is a common cause of elevated PSA's.
A biopsy certainly causes inflammation, so I suspect that a rise in PSA due to that event would be common.
I was told that a number of things can make your PSA go up. I was told to abstain from sex for 7 days before test. I was also told that a DRE can make it go up a little. It stands to reason that a biopsy would for sure make it go up, maybe way up. This is of course before surgical removal..
My PSA was 4.3 which prompted the biopsy. After the biopsy and as part of the required stuff for permission for surgery, I had another PSA test only a few weeks after the biopsy. The PSA had jumped to over 7.
Chris: I just returned from a second opinion visit and of course they did a blood work up for the visit. The doc. told me to not pay any attention to my PSA result because the biopsy was done so recently. It went from 4.1 to over 8.