I have a pain when I pee and discharge. Sometimes there is a pain in my seminal vesicle and in the waist. I don't know whether I have a prostatitis or vesiculitis. Can you help me?

According to your symoptoms, it's more likely to be prostatitis. You can take a prostate test and semen test in hospital and than your diseases can be diagnosed. 
Well, no matter you have prostatitis or vesiculitis, Diuretic and Anti-inflammatory Pill can cure you.
Because prostate and the seminal vesicle are very closed to each other. If there is a infection or inflammation in prostate, it is possible to infect the seminal vesicle. Meanwhile, vesiculitis causes prostatitis as well. So the treatment of the two diseases must taken at the same time incase the affect each other. Diuretic and Anti-inflammatory Pill have almost 50 kinds of elements in its recipe. Each of the element have its unique function in curing the disease. Some can kill bacteria, virus, mycoplasma and chlamydia, some can promote blood circulation and Qi, some can clear away heat and toxic material, and some can stop pain. 
Your symptoms would release after you take the pills for a month and you would be radically cured after taking them for three months.                                    
Released in 2010-12-01 15:49:43