I'm 21 years old and recently had a herniated disk in my lower back, the disk was impending on my right side, pinching the nerves and affecting my entire right side. I took physiotherapy for about 6 months and regained the flexibility I had lost in my legs and back while spending time in the hospital. Since the surgery I noticed that my erections are not as rock hard as they could be. I can still preform but on occasion i find it tough to get it up. As well the head of my penis stays rather soft throughout sex. Is this a normal reaction when dealing with back surgery that had somewhat effected the nerves around my lower back? If so, is it permanent?