Split ends reflect drying and trauma over time. The longer hair ends are the oldest part of the hair shaft and that is why we see the greatest damage at the ends. The trauma is caused by sunlight, blow driers, hot rollers, rubbing too hard, hacking it with dull scissors, back brushing, using a metal comb with fine tines, perming, bleaching or coloring, putting rubber bands around the hair and the use of various hair sprays. The use of good shampoos and conditioners help keep the hair in better shape. Once the cuticle cracks or breaks and the cortex is damaged, only a good hair cut (which removes the damaged hair) will allow you to get the healthy hair look you want. These pictures show the complexity of a hair shaft, with many layers, each of which can be damaged permanently if you don’t take good care of your hair. Look to the right side of the photo and see a still intact hair shaft so you can see if someone had a hair cut and used a good shear to cut this hair a bit shorter, the end will be clean and not irregular.