Anxiety disorder causes people to intermittently feel nervous, have a sense of impending doom or danger, sweat, hyperventilate or experience an elevated heart rate. Many people with anxiety disorder have panic attacks.

Studies show that exercise may help reduce symptoms of anxiety. Exercise releases powerful chemicals such as endorphins and serotonin, which improve mood and feelings of well-being. It can lower cortisol (also called the “stress hormone”) levels and support nerve cell growth in the hippocampus, a region of the brain that helps regulate mood.

Studies show that foods rich in zinc can reduce anxiety. Zinc is found in foods such as beef, poultry (dark meat), whole grains and nuts.

Panic attacks usually last less than 10 minutes. However, some of the symptoms may persist for longer.

Genetics play a role in anxiety. If someone in your family has an anxiety disorder, it's more likely that you will as well.