Panic attacks, in and of themselves, are extremely terrifying experiences. It is, however, the knowledge that you have to live your life with them and could have another one at any time that is truly debilitating. Knowledge of why they happen can be important. Then, a solution will be more clear.
Some say that fear is an acronym for false expectations appearing real. This truly sums up what happens during a panic attack. Anxiety builds in your mind and manifests itself physically once it reaches critical mass.
Most people will never have to deal with anxiety attacks, not because of any biological gift or lack thereof, but because of the manner in which they think about things. At all times, you're somewhere on the anxiety scale. And some anxiety can be good and related to happiness or positive anticipation.
It is the negative thoughts and expectations that put you higher on this panic scale though. By choosing to hold fear or focus on the worst possible outcome in your mind without perspective, you are taken higher up on the scale. This fact is what leads to an increasing frequency in panic attacks after the first one. You tend to fear the recurrance or at least think about it as a possibility. It is important to know that fears can be overcome and thinking patterns altered to live a calmer, happier life.
Most panic attacks are something like the description that follows. There is something you're worried about. Instead of dealing with it constructively, you continue thinking about it, usually in the same way. The fear becomes more real each time. Your mind is building to a panic attack. You will have difficulty breathing and a pressure will build in your chest. Your heartbeat will increase; your palms may become cold and clammy. You may also break into a cold sweat and have difficulty moving or speaking. Some symptoms can be connected to or cause others. For example, your racing heart and short breath can lead to fluctuating body temperatures, numbness, lightheadedness or diziness. You'll probably feel like you're going to die, but you won't.
When it begins to build it becomes increasingly difficult to control the more time you waste, so take steps to stop the cycle early. It is far more effective to take steps to prevent them from starting in the first place though.
If you suffer from regular anxiety attacks, you probably have changed your life in some way to avoid stressful situations. While this seems logical and may help to a degree, it is no way to live. Your fears and thought patterns are at the root of the problem, and you can control both of these things. Physical problems are almost never the cause of panic attacks. You'll have more control over your panic attacks once you stop building them up to be more than they are.