Your eyelashes may be shedding so much owing to a couple of reasons, you could be experiencing an unhealthy and overwhelming level of distress, pulling on your lashes too much, taking out lash extensions wrongly, practicing unhealthy beauty habits, going to bed with mascara, or you could be experiencing a medical condition that triggers an unhealthy amount of eyelash loss (blepharitis, trichotillomania, or skin cancer).