I have never had sex (cause i have never had sex) my urethritis was caused by masturbation. did i do it too hard? what is the best way to cure this?

Many causes: to Urethritis. It literally means "inflammation of the urethra" and while most of the causes are infections (STD's) you can get chemical irritation , mechanical irritation (masturbation), or foreign bodies in the urethra. Most of these causes are mild and go away within 1-2 days unless it is an infection and you will require a culture and antibiotics. Go to a provider if not improved in 1-2 day