A split end is when your hair splinters due to damage to the oldest part of the hair shaft. The longer you grow your hair, the older the ends are, the higher chance of having split ends.
The hair cuticle, which is the outer protective sheath of the hair’s shaft, will eventually wear off over a period of time. This process is further sped up by heat styling, chemical treatments, exposure to extreme weathers, and more. Damages to the cuticle leave the inner layer of hair exposed, making our hair weaker, dehydrated and more prone to split ends.
If left untreated, split ends may lead to breakage. This is when the hair breaks at a point that causes the strand to be significantly shorter.