Several factors contribute to split ends, most of which are within your control. Over-washing your hair (more than three times a week) strips away its natural oils, leading to dryness and breakage. Vigorously rubbing your hair with a towel when wet can also cause damage, as wet hair is more susceptible to breakage. Excessive heat from styling tools like straighteners, curling irons, and even blow dryers can further dry out your hair and contribute to split ends. Finally, frequent chemical treatments like coloring, perming, or relaxing can weaken the hair shaft, making it more prone to splitting.