The causes of ejaculation include physiological factors, drug factors, reproductive system abnormalities, endocrine factors, neurological disorders, etc. It is recommended to consult a doctor in time. 1. Physiological factors: excessive masturbation, frequent sexual intercourse, lack of sexual knowledge, disharmony between husband and wife, unsuitable environment, etc., can trigger the performance of ejaculation. 2. Drug factors: such as prazosin and other adrenergic receptor blockers, etc., patients taking, may appear impotence, penile erection, may also cause ejaculation performance. 3. Abnormalities of the reproductive system: such as vasovaginal blockage, encopresis, genital trauma, etc., the patient is more often accompanied by other discomforts, such as encopresis patients may also be accompanied by urination difficulties, pain, foreskin edema and other symptoms. 4. Endocrine factors: such as androgen deficiency, adrenal tumors, etc., may also trigger the performance of ejaculation. 5. Neurological diseases: such as spinal cord injury, diabetic peripheral neuropathy, etc., so that the relevant pathways or peripheral nerves are damaged, resulting in the stimulus can not be transmitted to the center or the intensity is not strong enough to excite the ejaculatory center, which triggers the lack of ejaculation. Patients with ejaculatory manifestations, it is recommended to seek medical attention in a timely manner, under the guidance of the doctor to identify the cause and carry out appropriate treatment.