Bummed out...thinning out in center/end of dreadlocks

My dreads are all natural, free-form dreadlocks, 5 years old. I'm bummed out because one of my locs is thinning out towards the bottom. The end is thick, and the roots are thick, but I've got about a four inch section that is really thin. I know the end will eventually fall off. Is this common? I am thinking that the cause is from using the dread to tie up other dreads. The root is behind my ear by the base if my scull. It has been a go to for tieing up other locs. I'm just wondering if others have had this problem.
updated by @donna2: 09/30/15 10:58:10PM

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thats not really thin at all definately not worth worrying about

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