1. Avoid styles that place tension on your edges
Tight ponytails, buns, and braids place a lot of tension on your edges that will cause them to break and thin over time. When I was a little girl, I wore box braids 9 months of out the year and often times the braids at my edges would be so tight over time the braids would rip my hair out.
2. Massage edges with oil
Scalp massages with jamaican black castor oil may help stimulate growth as well as thicken edges.
3. Keep edges moisturized
Dry hair is more prone to break than hair that is adequately moisturized. Be kind to your edges, keep them moisturized.
4. Avoid over-brushing your edges
Brushes are not evil, but think of the situation this way: if you’re experiencing lower back pain, the last thing you want to do is lift a 50 pound box. That’s just asking for more pain and more severe back issues. Similarly, when dealing with thinning edges, over-brushing will definitely cause more harm than good. When my edges started thinning a couple years ago I gladly threw away my brush because it was only making the situation worse.
If you do use a brush, use a soft bristle brush but don’t rely on solely the brush to tame your edges. Dampen your edges before brushing, use non-flaking gel or moisturizer, and tie your edges down with a scarf to smooth out your edges.
5. If you relax your hair, apply the relaxer to your edges last
This tip applies even if your edges are healthy and thriving. By applying the relaxer to your edges (and nape) last, you reduce the risk of over-processing your already weakened hair. Touch up your edges (and nape) every other relaxer is also an option.
Hope this helps!