Numbness of the glans during ejaculation may be a physiological phenomenon, or it may be caused by glansitis, prostate diseases and other diseases. 1. Physiological phenomenon: frequent masturbation, excessive sexual life, too much mental tension may cause the phenomenon of numbness of the glans during ejaculation. 2. Glans inflammation: the external bacteria, viruses, candida and other pathogenic bacteria infection, causing inflammatory reaction of the glans, may cause abnormal sensation of the glans, manifested in the phenomenon of numbness of the glans during ejaculation. 3. Prostate diseases: for example, prostatitis, prostate hyperplasia and other diseases, may cause nerve pulling or affect urination, which leads to numbness of the glans during ejaculation. In summary, the glans is numb during ejaculation, there may be other reasons, it is recommended to go to the hospital in time for further examination, to clarify the cause of the disease and follow the doctor’s instructions.