Prostate cancer cases are increasing among men under 30; Click here to know what causes areThis is a serious problem, as prostate cancer diagnosed at a younger age is more aggressive and reduces the chances of survival. This is a serious problem, as prostate cancer diagnosed at a younger age is more aggressive and reduces the chances of survival. Let's learn why prostate cancer is now affecting younger men and what its early symptoms are. Why are prostate cancer cases increasing? Blood in the sperm- This can also be a significant symptom of prostate cancer.