Heredity, biological factors, mental conditions, medications, personality, environment, and brain chemistry can all potentially cause anxiety attacks. Some common biological causes include inner ear issues, hyperthyroidism, hyperventilation, low blood sugar, heart conditions, adrenal gland tumors, and Wilson's disease. Mental health conditions, stimulants like caffeine, and antidepressant medications can also trigger anxiety attacks. Those with anxious personalities and in stressful environments may be more prone to attacks due to biochemical imbalances in the brain. The document provides a website for more information on dealing with anxiety attacks.