Nightfall is not as suchba problem.u have to take proper food,nutritious diet,regular exercises ,avoid too much watching porn and avoid too much such thoughts. If u feel too much exhausted in morning after nightfall then u have to consult physician. Homoeopathy is the best choice in case of such cases. Feel free to contact.

Semen production goes on for 24 hours in the body. It gets stored in seminal vesicles which is kind of storage tank for it. Now due to excess formation and no drainage system, it gets overflown and comes out of the body in form of nightfalls. U need to masturbate regularly to avoid this. It's not a mental disorder, it's physiological processes only, u need not worry about it.