###Human: Will penis extender cause shortening of size instead of enlarging? ###Assistant: Hello. I want to know the reason for which you are using a penile extender. Do you have a very decent size why you want to increase it further? It is like your height is 6 feet but you want it to be 6.3. Everything you do has got side effects. If not done properly can lead to trauma and hence shortening. Are you diabetic or hypertensive? Any other chronic illness?