About 2 years ago, my nipple had scratches and sore skin during the relationship with my boyfriend. After that incident, I have nipple erection problem. My nipples don’t get hard as it used to be. When it gets big, it stays only for few seconds and then it gets flat. I think it may have led to the formation of scar tissue and that may cause reduced erection. symptoms stayed the same for 2 years. Do you think it is possible my nipples to get hard as used to be? Are there any treatments for this?