Blood sperm for the first time is mostly caused by seminal vesiculitis, which usually returns to normal in about 15-20 days if left untreated. The seminal vesicles are the internal reproductive organs of the male, and semen is ejected from the testicles and then discharged through the seminal vesicles, and when the seminal vesicles are infected with bacteria, it can lead to hematospermia. This condition is mainly due to the bloody secretions inside the seminal vesicles mixing with the semen, resulting in an inflammatory symptom, which is usually painless and can only be detected after ejaculation. If the condition is left untreated, it takes 15-20 days to return to normal. However, if hematospermia persists for a long time, it is recommended to go to the local hospital for symptomatic treatment under the guidance of a doctor in order to avoid delaying the condition. In addition, patients are advised not to have sexual relations until the disease has fully recovered to avoid burdening the seminal vesicles and affecting the recovery of the disease.