The feeling of ejaculation but no semen can be considered to be caused by too frequent ejaculation, reverse ejaculation and vasectomy and other factors, it is recommended to go to the hospital for further examination to clarify the cause of the disease. 1. Physiological factors: If there is excessive masturbation or too frequent sex within a short period of time, it may lead to excessive consumption of semen, it is recommended to reduce the number of ejaculations and moderate sex. 2. Reverse ejaculation: If there is a bladder neck, prostate surgery, as well as trauma or inflammation leading to urethral stenosis, taking a-adrenergic receptor blockers and other drugs leading to smooth muscle contraction weakness and other conditions, may cause reverse ejaculation, resulting in semen can not flow out of the body. 3. Vas deferens blockage: if there are bilateral epididymal tuberculosis, epididymitis and filariasis and other diseases, the vas deferens itself or nearby tumor compression may cause vas deferens blockage, resulting in orgasm when semen can not be ejaculated out of the body. Therefore, when there is a feeling of ejaculation but no semen, it is recommended that the patient go to the hospital for further examination to clarify the cause of the disease and be treated under the guidance of the doctor.