Generally, masturbation more than twice a week on average is considered frequent masturbation or excessive masturbation. Frequent masturbation is likely to cause premature ejaculation and impotence, and even low libido and insensitivity, which can cause a decrease in physical fitness. Also, it can easily lead to adverse effects such as chronic prostatitis, depressed mental state, lack of concentration, memory loss, and affect work and study. In serious cases, tinnitus, vertigo, nausea and vomiting will also occur. In addition, often excessive masturbation will lead to masturbation ejaculation time is getting shorter and shorter, it is recommended that people who have the habit of masturbation, it is best to once a week is appropriate.