How can you get your horse to stop rearing when you lead her?

Horses do things like rearing. bucking etc. for a reason, there is always a reason behind this behavior. Here's one reason on why your horse rears when you lead her: Horses are very sensitive creatures they sense everything from us humans. You could be nervous or scared when you lead your horse therefor your horse senses or feels your nervousness and she immediately feels nervous or threatened so she rears that's the best answer I can come up with. Or your horse is simply being bold!