Can i get ed at 20.i do get erections but it takes time and are not for long and complete.moring erections are not usual and completely erect either.

It can happen: You're young to have ed, but it can happen at any age. Probably the most common causes in a young man--assuming you're not taking medications that cause ed such as antidepressants--are depression or anxiety. If you don't think that's the issue, you could get a testosterone level checked. This is something you should discuss with your doctor.