Determine the cause of rearing
You need to check the reason of the horse rearing. It may be due to some problem. In case your horse rears often, seek the area where he rears. You should also watch out any patterns and see if the horse rears in front of some people. Also make sure that his bridle or saddle is not too tight as it might be hurting him. Also consult a vet in order to check whether he is sick or not.
Hit the horse with a halter and lead rope
Catch your horse and hit him with a halter and long lead rope. Remember that the lead rope should be around 20 feet long. This is for your own safety. In case the horse rears when you are controlling then the long lead rope will give you time to move away from the area while still taming him.
Talk your horse to a round pen and let him exercise there for almost 15 to 20 minutes. By this, your horse will not only ward off the excess energy but will also let him focus on you. It will also lead your horse in learning more effectively.
You can also let your horse walk with you in the round pen. However, make sure the horse’s head stays down while he is walking.