Hair extensions are a simple and easy way to add length and thickness to your hair in no time at all. Can extensions cause hair loss? If you wear the extensions on a daily basis, the clips and hair can become quite heavy and put a strain on the hair they're clipped into. This means clip in extensions and hair loss have a strong relationship, because they can cause hair close to the head (where the clips are) to become thin, giving off the appearance of shedding. So, don't wear it for too long.