< back The presence of blood in semen (the fluid discharged upon ejaculation) may be caused by inflammation, infection, obstruction or trauma. Review Date: 6/22/2000 12:00:00 AM Reviewed By: J. Gordon Lambert, MD, Associate Medical Director; G. Eric Morgan, MS3; RxRemedy The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. Copyright 2002 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.