Very often a horse is considered a problem horse if the human doesn't understand its behavior or it doesn’t react the way the owner wishes or expects. Some of the horse reactions can indeed be very dangerous to horses, humans and other creatures.
If the most commonly known solutions don’t fix the problem, the horse is considered unwilling or even dangerous. It gets the label “Problem Horse”
When I work with a "problem horse", first I like to find out about what the real problem is and why. Very often the problem you see is not the actual problem.
If one knows about the real problem and where it may have come from, one can work on that issue and in the end, understood, helped, and maybe fixed.
A horse never does anything without a reason…