There are many reasons for split ends in the hair.
Physiological factors such as split ends where the hair is too long and the oil does not moisturise the ends.
Pathological factors such as plucking fetish, nodular brittle hair syndrome, hair tangles and abnormal hair shaft disorders such as bird’s nest hair and kinky hair syndrome.
environmental factors such as prolonged exposure to the sun, high temperatures and dryness and other harsh environments
Lifestyle factors such as excessive scratching of hair, frequent perms and dyes, excessive blowing with hot air, frequent washing with strong alkaline soaps or shampoos, and lack of sleep can all lead to split ends.