The erection stops when the tension ring is removed, FDA recommends use no longer than 30 minutes. With some men, minor side effects can occur, such as petechiae and ecchymosis. Petechiae are caused by placing the penis under negative pressure too rapidly. Reddish pinpoint-size dots appear on the surface of the penis. The penis may need to be reconditioned slowly after a prolonged period of inactivity.
Ecchymosis is a bruise caused by the penis being held under vacuum pressure too long.
Neither condition is painful nor serious and does not need treatment. They stop happening after a few uses. This device may not be an appropriate treatment for men who have sickle cell anemia, leukemia, or blood clotting problems. Proper use of it requires some manual dexterity and average hand strength. All criticism of these devices centers around the use of tension rings, and the loss of spontaneity in lovemaking.