The absence of semen in ejaculation must be taken seriously enough. At this time, you should go to the hospital for a routine semen test. It is recommended to have 5-7 days of no intercourse and no ejaculation so that the results of the test are true and reliable. In this case, the semen routine should be tested to see if there is sperm. If there is sperm, it means that ejaculation may have been too frequent and no sperm was ejaculated. If there is no sperm in the test result, further tests will be needed. This condition may require a bilateral testicular puncture to see if there is sperm in the testicles. If the testes do not produce sperm, this condition may be a case of abnormal lesions in the testes. If there is sperm in the puncture, it may be a blockage of the vas deferens and further examination and treatment will be required.