Too much pressure can cause temporary bruising of the penis or water blisters which look like small red pinpricks. To avoid this go slowly and increase the vacuum gradually over a long period of time. Medical Doctors have been using vacuum pumps to treat impotence for years. If done carefully, pumping is safer than surgical alternatives to penis enlargement. Select this link for an article about the risks of surgery .
Most men report significant size gains, both during pumping and between pump sessions.
Regular use of vacuum pumps gently stretches the supensatory ligament - resulting in permanent size gain. Much like bodybuilding, gains can be maximized by practicing a consistent regimen of pumping several times a week. Most men report permanent results begin to show after about a month of regular use. Two stage Pumping is a special technique and cylinder style used by advanced pumpers. Like all our cylinders our two stage cylinders are sized to customer specification.