Unconscious /uncontrollable erection is happenning during nights very often and harmones are getting released. is it a problem? can it be controlled?

You're a man!: This is supposed to happen to you. If by "hormones being released" you are referring to nocturnal emissions, that's normal and good also. If anyone has told you otherwise, they are either ignorant or trying to disturb you for their own (often dark) purposes. Your sexuality is to enjoy, to make it possible to be a good husband / father. Talk with some smart, reasonable men -- maybe even dad.