I am a 16 year old male. During the night, I will find blood in my pants and I dont feel any pain, and sometimes I dont even know it happened until late in the day. I have had tests done, such as an ultrasound on my kidneys and a urine test. They have all come back fine. What are some possible causes of this?
Degree understand your concerns went through your details. If ultrasound on kidneys and urine tests are done and doctors could not find anything which could cause blood leakage from penis, then you should not worry much.  Bleeding is also possible from a tear in one of the fragile veins within the prostate, the organ which produces most of the seminal fluid following sexual stimulation. Arousal without ejaculation, excessive intake of spicy foods or you will usually notice spots of blood on your clothing as well. Irritating the prostate gland may also cause inflammation that will increase your risk of bleeding. Infrequent alcohol, with Chat Doctor.  The prostate may also become infected, causing bleeding. I suggest you to consult the doctor once again if the symptom persist. If you require more of my help in this aspect, please use this URL. http://goo.gl/aYW2pR. Make sure that you include every minute details possible. Hope this answers your query. Available for further clarifications. Good luck. Take care.