 [ Symptoms ] when riding my bicycle my penis shrinks into my pelvis it is very uncomfortable is this dangerous to my prostate  even when i stand up my penis feels really uncomfortable when riding hard or uphill i am 26 male about 200 pounds and 59 i do not wear bicycle shorts [ Disease ] this is not going to hurt your prostate but it may not be considered normal for this to happen you will need to see a urologist in order to be properly examined there may be a minor surgical procedure that can fix this hidden penis issue