The ejaculated semen is as thin as water and how long it takes to recover cannot be generalized, but the cause of this phenomenon needs to be clarified first. Freshly ejaculated semen is jelly-like and jelly-like, and can generally be liquefied into a watery solution within half an hour, so if ejaculated semen is watery after being placed for a period of time, it is a normal phenomenon. If sexual life is too frequent or excessive masturbation, insufficient semen production and reduced sperm density will also result in a water-like change of sperm, which can generally be recovered in about 3 days of abstinence. If there is chronic seminal vesiculitis, it will lead to a decrease in the secretion of coagulase, and the ejaculated semen will appear like water, which requires relevant treatment to recover. In addition, diseases such as epididymitis, orchitis and ejaculatory duct obstruction can also cause ejaculated semen to appear like water, which requires prompt differential diagnosis and active treatment at the hospital, and the specific recovery time needs to be determined by the doctor’s treatment plan. To avoid ejaculating semen like water, patients should pay attention to a moderate sexual life, actively exercise, regular work and rest, and do not stay up late.