Actually, if you are seeing the Physio, they can refer you on to Orthotics.
To the poster who said that they have been told that the pain gets better with age - IME that's not always true.
From my own personal experience, yes, you learn to 'cope' with the pain, but that doesn't mean that you aren't in pain IYSWIM.
DS2 goes about his day fairly happily now, but when you ask him to rate his pain from 1-10, he will invariably be at a 6-7 at best. He just lives with it because, like me, it's all he has ever known.
He is now getting to the point where the Physio has even discussed regular pain medication with me, we are in decisions about that right now...
His pain, and mine HAVE got worse as we have got older, and other people that I have spoken to with severe hypermobility say the same thing, that the pain is worse, but they have learnt to 'cope' with it better.
Lots of GP's and physio's don't seem to realise this unless they get you to rate your pain every day.
Some days my DS2 is in tears because he can't even put his feet on the ground to get out of bed without me massaging his feet, ankles and calves.
Yet after I've done that, despite being in pain still, he will get up and get on with his day.
Massage is very good, as are warm baths.
Swimming is an excellent choice of sport for someone with hypermobility because the water supports their joints.