As a rule, cock extenders should not hurt. It’s normal to feel a small pinch across your skin or on your nuts from time to time. However, if you start to feel any direct and intense pain in your cock, take the device off immediately. It’s worth noting that penis traction devices can’t lead to nerve damage or other injuries, but it is important to watch out for any signs of severe discomfort. In this case, see whether you have adjusted your penis stretcher correctly or turned the tension down.