Involuntary discharge of semen from male sex organ i.e. penis is called as night fall. This condition is mostly found in teenagers or those reaching towards the stage of puberty. Medically, this condition is also called as night discharge, wet dreams or nocturnal emissions. Since semen is discharged during sleep late at night or early in the morning therefore this condition is called as night fall. This condition arises due to excess of semen in the male reproductive organs. Hormonal fluctuations, fullness of bladder and use of testosterone drugs result in enhancement in the frequency of night falls. Due to excessive night fall, some men may complain of physical and mental weakness, loss of sleep, reduction in sexual performance, pain in the knees or infertility in some cases.