Sir. I'm 21 years old. Recently sperms are leaking out continuously from past few nights regularly. I'm not masturbating. Sometimes bad dreams comes. Is that a serious issue?
You are having nocturnal emissions. Your body NEEDS to get rid of old sperm and semen and does during your sleep.
Masturbation will likely reduce/eliminate this.
It's not serious. In fact it shows you are in very good sexual health.
Hope it helps.