Panic attacks cause extreme anxiety or fear that lasts a few minutes or as long as an hour or even more; the average panic attack lasts 20 to 30 minutes, being worse than anxiety attacks.
These sensations often come on unexpectedly, without an identified cause, though they can also develop in response to certain triggers. In general, a 'Panic Attack' is not life-threatening, but experts suggest people who regularly experience them, try to learn coping mechanisms & avoid triggers. Some common symptoms one may feel are, hypertension, dizziness, tunnel vision, a tight chest, sweating, tingling, prickly skin, flight or fright syndrome, to disassociation from one's external world, to feeling lack of control. But there are ways to cope to diminish the associated pains.