I used to do handjob 2-3 times per day when I was young. Now only 1. Is this the cause of my chronic prostatitis and ED? Do I have a chance to be cured?

Hello. It is quite possible. Mansturbation for 2-3 times per day, that's a lot of. 
Too much mensturbation do harm to the kidneys and the genital system. To get a full recovery, you need to cure your prostatitis and preserve your kidneys. Your ED can be affected by your weak kidney. 
For your condition, you take Diuretic and Anti-inflammatory Pill can have your prostatitis cured. This med can tonify the kiendys somehow even it cannot completely make your kidneys become strong.                                    
Released in 2011-10-20 14:38:51