I am 16 and I masturbate when I do it once in a while its green and urination is painful after that but if I do it like once in a week or two weeks it comes out white
Hi Micah,
Green semen can indicate a possible prostate infection. Since you say that urination is painful after that, it does point strongly to a prostate issue. The prostate is sort of the "valve" that switches between urine or semen.
You should see your doctor, preferably a urologist.
Good luck.