You probably put a hair tie in your hair without thinking. But a hair tie can indeed be bad for your hair, luckily there are alternatives.
The damage a hair elastic can cause
If you put your elastic band too tight around your hair, you have a chance that hairs will break off. The metal part is often a culprit:hairs can get caught on it, which then break off. If your elastic band puts too much pressure on your hair roots, hair can even fall out.
Which hair elastic should I use? Fortunately, there are several options that are not, or a lot less, bad for your hair. Do you have thin hair? Then you can use a rubber band without a metal part. There are also elastic bands with rubber incorporated in them and the Invisibobble is also a good alternative to the 'normal' hair elastic.
If you tie your hair at night
Do you wear a ponytail or a bun at night? Then it is best to use a wide fabric elastic that is not too tight.