My daughter is going for a tilt-table test to confirm whether or not she has POTS. This is all very new to me and I really don’t know where to start. She is 19 and has always been very active and athletic. But from what I have been reading it seems as if POTS is usually not the only diagnosis. Does it seem to go hand-n-hand with something else?? I am really confused. Can POTS just happen or has something caused it?