I need information for my husband

My name is Amara Garcia. My husband is only 24 years old and is suffering from what I believe to be prostate problems. I'm not sure exactly how these things work, but from all of my research I believe that his symptoms are stemming from his prostate. As most men, he doesn't want to have a prostate exam, but I found a web-site that said something about a simple blood test that can determine if he is having prostate problems. Does anyone know if this blood test is just as effective in diagnosing prostate problems as the exam? His symptoms are: frequent urination, pain after ejactulation, pain in lower back and thighs, trouble getting an erection, frequent mood swings, and cold sweats. I am very worried about him. But I'm not sure exactly what's wrong with him and I was wondering if any of you could help me find out. Thank's so much for your help!