I've heard that it can cause orchitis, and I've been suffering from this condition for 14 months. How can I prevent this occurrence?

Well, as long as you suffer from an epididymitis, it is possible for it to spread locally in your genital system. Except for epididymitis, other inflammations like prostatitis, seminal vesiculitis and orchitis may also spread. 
So the best choice for you is to have this condition cured. 
Epididymitis often occur while you have a poor immunity and you would probably get an bacteria infection. And it is always followed by posterior urethritis, prostatitis and seminal vesiculitis. So the treatment of epididymitis must be very thorough and radical in case the complication occur or itself recur.Diuretic and Anti-inflammatory Pill cures epididymitis in three months.It is a kind of traditional Chinese medicine made from almost 50 kinds of elements and each of them have their unique function in curing prostatitis. Some of them can promote blood circulation and dissolve stasis, some can promote Qi to stop pain, some can kill all the pathogen in three months, and some can clear away heat and dampness. They all aiming at eliminating your symptoms of epididymitis to cure it.                                    
Released in 2011-10-11 15:41:22