Absolutely, recent (with 24 hrs) ejaculation can increase the psa test result.
There are many other activities that can also increase psa (eg. a digital rectal exam, rigourous physical activity, assorted prescription meds, infected prostate (hmm, possiibly that's the infection leading to frequent urination here??), etc.).
by the way, in the night before the test, i had masturbation.
i thinks test was 12 hours later. can masturbation increase psa by 0.8?
no family of prostate cancer but my father has enlarged prostate and had operation 3 years ago.
To explain your symptoms, have you been screened for an STD if that were a possibility?
In younger men, psa tests have value when there's a rapid rise in the level between tests, as that's certainly attention getting.
A study of a large grouping of men under age 40 showed that levels encountered were 0.01 to 3.34 with a median/average of 0.56 ng/L [ BJU Int. 2012 Dec;110(11):1627-35 ]
Do you have a family history of prostate cancer?
There is mixed thoughts about PSA tests and i would say because of your age you dont have prostate cancer. Many things make the psa go up and down. It it was around 3.5 i would suggest a biopsy
Do you have a urinary tract infection?