This also identified as nocturnal emission i.e. an involuntary discharge of semen during sleep. This is also known as nightfall. In dream one feels that some beautiful woman along side and doing sexual act with her and this leads to semen discharge. In the beginning he awakens immediately at the time of discharge. But slowly he is much in grip of this ailment that he fails to notice when he discharged the semen in sleep. Nightfall mostly occurs at night but often it happens in the day also. Rare discharges are not harmful, but frequent nightfall, undoubtedly affects one's health. This leads to other disorders as well so it is necessary to consult for proper medication to stop this ailment. It is also advised that do not read pornographic literature, not to indulge in vulgar talks, not to see nude photographs, not to imagine fantasies, which arouses their sexual feeling. This problem is rampant in every part of the world but don't lose heart.