Panic attacks are sudden periods of intense fear that may include palpitations, sweating, shaking, shortness of breath, numbness, or a feeling that something bad is going to happen.   The maximum degree of symptoms occurs within minutes.  Typically they last for about 30 minutes but the duration can vary from seconds to hours.  There may be a fear of losing control or chest pain.  Panic attacks themselves are not typically dangerous physically.

Panic attacks can occur due to a number of disorders including panic disorder, social anxiety disorder, post traumatic stress disorder, drug use disorder, depression, and medical problems.   They can either be triggered or occur unexpectedly.  Smoking, caffeine, and psychological stress increase the risk of having a panic attack.  Before diagnosis, conditions that produce similar symptoms should be ruled out, such as hyperthyroidism,hyperparathyroidism, heart disease, lung disease, and drug use.