Splitting and hair breakage are the signs of damage, which can be caused by several factors. Usually, a lack of proper hair care, and the use of hair products containing harsh chemicals, can make your hair dry and brittle. The frequent use of blow dryers without the application of any protective hair products can cause the hair to become brittle and more prone to breakage. Similarly, hair perms and relaxers, as well as the frequent use of hair straighteners can damage your hair, and make it more prone to splitting.