Hi, I'm a 16 year old male. My problem is that lately, I cant seem to get full erections. Not only that, but they dont last long. maybe 10-20 seconds or so (longer if i try). When i look at porn or even use mental imagery, it doesn't seem to work for me like it used to, and the imagery in my head cant keep constant because all sorts of other thoughts cloud it. I don't know why this is happening, I mean I can masturbate and ejaculate fine, but i cant get it up fully. Oh, and also i get this internal "itching" feeling in my penis whenever I think of something arousing, but masturbation doesn't seem to relieve it, only by relaxing does it go away.
Why can't you keep the images in your head? Do you have a lot of stress and stuff that you think and worry about? Stress and Worry is a major cause of problems getting and maintaining erections.