I have some breakage in my nape area, too. I believe it's from 5 things:
1. relaxer breakage
2. wearing my ponytail too tight
3. wearing my night scarf too tight
4. not moisturizing this area
5. putting my hair up in a high ponytail to sleep at night
6. my stylist not trimming my hair layer by layer but just trimming it at the bottom thus leaving some ends untrimmed
Since I've started taking "better" care of my hair, I've noticed it growing and getting healthier. I moisturize my edges every night. I wear my hair loose at night (clipped on the top of my head). I don't wear my ponytails too tight and if I put my scarf on tight, it's only for a short while to "set" my hair (2 hours at the most). And I make sure to tell the stylist to trim my hair "underneath", too.
Now I'm curious about the trimming thing...