Possible Causes

Exact causes of panic attacks and panic disorder are unclear- 

HOWEVER 

•tendency to have panic attacks runs in families 

•possibly a connection with major life transitions such as graduating from college and entering the workplace, getting married, and having a baby. 

•Severe stress, such as the death of a loved one, divorce, or job loss can also trigger a panic attack, which then can lead to panic disorder.

Also could be caused by: 

•Mitral valve prolapse, a minor cardiac problem that occurs when one of the heart’s valves doesn't close correctly.

•Hyperthyroidism (overactive thyroid gland)

•Hypoglycemia (low blood sugar)

•Stimulant use (amphetamines, cocaine, caffeine)

•Medication withdrawal