A panic attack is an episode of sudden and intense fear and apprehension. Some of its symptoms may be palpitations or accelerated heart rate, trembling or shaking, blurry vision, shortness of breath, feeling of choking, abdominal stress, chest pains, and weakness in the knees. Sometimes you might even feel that you're going crazy, or worse, dying.
Panic or anxiety attacks have a lot of causes. Some causes are biological like genealogy, post traumatic stress disorder, hyperthyroidism and Vitamin B deficiency. Some people also Subliminal Guru Review experience symptoms of panic attacks as side effects of certain medication. Recurrent attacks are often triggered by a specific situation, like speaking in public, or getting in a crowded elevator.