Five year neglected dreads breaking off

[missyannie]

I have five year neglect dreads, no maintenance besides separation. This year four dreads have broken off in total at the middle of a dread and it's starting to freak me out. I don't know really what I can do to prevent this. And in some of my other dreads of I run my fingers down the length of a few of them I can feel a noticeable weak spot, like it's thick and then there is a spot where it is very thin. That's likely where it will break off in the future? I don't have any thinning hair that I know of, I'm a girl.

Any experience would be helpful maybe this is normal?