Physiological causes of low semen are mostly seen in frequent sex life or frequent masturbation, which can be restored to normal after abstinence. Pathological factors are mostly seen in seminal vesiculitis, prostatitis, and testicular developmental abnormality, ejaculatory duct or vas deferens, retrograde ejaculation, etc., which need to be given according to the condition such as general treatment, medication, and surgical treatment. 1. Frequent sex life or masturbation: Because ejaculation is too frequent, the storage capacity of semen decreases, so the amount of semen is less when ejaculating. After giving up the habit of frequent masturbation and having sex in moderation, less semen will be improved. 2. Spermatitis, prostatitis: mostly due to bacterial infections, treatment with amoxicillin, levofloxacin and other antimicrobial drugs, it is advisable to reduce the number of times of sexual intercourse during the period of treatment, and if necessary, prohibit sexual intercourse. 3. Abnormal testicular development: Mostly due to congenital testicular development abnormality, sperm production is reduced, which in turn causes low semen, androgens can be given if necessary. 4. Occlusion of ejaculatory duct and vas deferens: it can lead to low volume of ejaculated semen, and the treatment is mainly based on surgery, such as vasectomy and anastomosis. 5. Retrograde ejaculation: Mild people can be given relevant medication, such as adrenaline drugs, such as ephedrine, etc., which can promote the closure of the bladder sphincter to prevent the retrograde semen, such drugs can cause palpitations, irritability, elevated blood pressure and other side effects, older people should be careful to use; for serious patients, conservative treatment is ineffective, need to be given to the surgical treatment, such as bladder neck reconstruction surgery. The low semen may also be other reasons, it is recommended to go to the regular hospital in a timely manner, improve the examination, clarify the condition, and actively diagnosis and treatment. The above drugs need to be used under the guidance of a professional physician.