Your horse rears because she has learned that it is a way out of pressure.
You can NOT let rearing be a way out. If she is really rearing, this is a dangerous issue, that you are not qualified to handle.
If she's just popping up a little with her front end, you'd better make sure you put a stop to it, before it turns into a bigger deal.
What exactly is going on when she rears? Are you pulling on the lead rope or making any sort of contact with the halter?
If it were me, when she rears, I would immediately get after her HARD by sending her forward around me, lunging her, as fast as I could get her to go, and quite frankly, probably being pretty harsh with the whip or end of the lead rope on her rump. You have to make it clear to her that her trying to go up is absolutely NOT the way out of work, that rearing actually means she's going to have to do more work. And I don't mean lazy trotting around you lunging, that is not work, I mean making her move her feet FAST.
I suspect that her rearing intimidates you and makes you back off, even if just for a second. You're going to have to get into her hard for it, in order to make sure she understands that rearing is not an option for finding release.
You should probably be asking your trainer for help with that immediately, as we cannot really know what's going on without being there or at least seeing a video of what's going on.
ETA - we humans, aren't really as good at multi-tasking as we'd like to think we are. Often, we struggle to truly pay attention to more than one thing at a time. Make sure when you are giving a correction with you whip or the end of you're lead rope you aren't inadvertantly applying pressure to the leadrope/halter.
I have a really hard time when opening and closing gates, keeping my hand on the reins still, while my other hand is opening the gate. I always catch my rein hand raising up or inadvertantly applying pressure to the bit, when my horse is standing or moving exactly how I want them, which is sending them mixed signals.
It's something we all have to pay attention to
Last edited by enh817; 10-13-2015 at 03:08 AM.