Although a lot of research has gone into finding out more about panic disorders, there seems to be no conclusive evidence as to the causes of panic disorders. The only thing that is clear is that for some reason, the body seems to go into panic mode and feel very threatened when there is actually no threat.
Most of what has been put forward as causing panic disorders comes from observing shared characteristics between people who suffer them.
It is quite inconclusive what the causes of panic disorder are, but the important thing to know is that this disorder is now acknowledged as a medical condition and you can get treatment. Talk to your health care provider or therapist about your symptoms and they will guide you towards treatment that will bring your condition under control.