Hi Dr. Damien, thanks for replying so quickly! I've never had any blood tests, no, my mum has had carpal tunnel syndrome (which I know can be connected to hypermobility) and my father has ankylosing spondylitis but apart from that there isn't anything. (I forgot to mention that I overpronate, but I suppose that follows from the flat feet). I've had orthoses before and am due some more but need the muscle strength to support the "new arches".

Thanks!