An high level of PSA can be caused by prostate cancer.
But it can also be caused by having a prostrate infection or a recent install to the prostrate such as having a DRE, sex, riding a bike, horse back riding, etc within a day or two before having the blood drawn.View Thread
PSA does not indicate cancer, but an increase might indicate the possibility of cancer.
However, PSA can also also be increased from BPH, infection, and physical motion of the prostrate such as having sex, bike riding, etc. Also it can be increased if the blood is drawn right after a digital rectal exam.
Also Avodart caused the PSA reading to be decreased by about 1/2 after taking it for 6 months or more. So your "true" reading is closer to 10.
And a PSA of 10 certainly need to checked out. Also an increase of 3 to 5 in 4 months is is also a warning sign.
First you need to get a recheck. And if still high take to your urologist.View Thread