Obviously there are many reasons why you can have a lame horse. But sometimes treating a specific area only will get you your horse so far.
Your horse has four limbs for a reason. When an injury affects a certain limb the other three limbs must work overtime. Not to mention the stabilizing musculature that will be sent into overdrive.
Correcting the area where the injury occurred is absolutely necessary but looking at the rest of the compensatory issues while they are current may help to prevent future nagging injuries.
After any injury I recommend having your horse checked and corrected before this becomes the new normal.
At the end of the day your horse is not just a machine. It is more than a sum of it’s parts and must be evaluated as a whole.