Homemade rubber bands do not work as sperm blocking rings. Blocking the essence is the penis in the erection of the penis at the root of the sleeve, applicable to the treatment of premature ejaculation of an item. Clinical role is not obvious, it is not recommended to use blindly, homemade rubber band, of course, even more can not be when the sperm blocking ring, may cause local congestion, edema, secondary bacterial infection, may cause skin allergies and other symptoms. If you have premature ejaculation symptoms, you should go to the regular hospital urology examination to determine the cause, for the cause of the active treatment, not be able to blindly use their own prescriptions, so as not to affect the health of the body. You should pay attention to your personal life, diet and sexual hygiene, and actively seek medical treatment for any disease.