Rapid ejaculation is clinically known as premature ejaculation, which is a male sexual dysfunction. Rapid ejaculation may be caused by over-sensitive penis, inexperience and urethritis. 1. Penis is too sensitive: due to the sensitivity of penile nerves, slight stimulation will cause sexual arousal, resulting in male ejaculation too fast. 2. Lack of experience: lack of experience in sexual life can lead to excessive tension during sex, causing symptoms of rapid ejaculation. 3. Urethritis: it usually leads to pain and discomfort in the urethra, testicles or lower abdomen, and may also lead to symptoms such as frequent, urgent and painful urination, and may even lead to hematospermia, and some patients may suffer from tension, anxiety or even depression due to recurring symptoms, which may affect the time of coitus. There are many other reasons that can cause rapid ejaculation. If patients experience symptoms of rapid ejaculation, they should go to the hospital in time.