My key bit of advice. I think it is important that you recognise as early as possible that pain is both physical and emotional and that there will be almost inevitably depression, anxiety, stress generally and that they shouldn't blame themselves. The problem is that sort of chronic pain creeps up on you, what point does acute pain become chronic pain it is a continuum there is not any sort of time that you can identify.
But I think the sooner that people are informed about what is happening to them and they can access information that will help them to understand the situation the better.