Some researchers speculate that intense anxiety might trigger abnormal and dangerous heart rhythms in people with existing heart problems. In other studies, panic disorders, post-traumatic stress disorder, and phobias have been associated with a higher rate of sudden death from cardiac events, including heart attack.
Gastrointestinal Disorders. Anxiety frequently accompanies gastrointestinal conditions. Of note, half the cases of irritable bowel syndrome are associated with anxiety.
Headache. Both tension and migraine headaches are associated with anxiety disorders. One study reported that 32% of people with chronic tension headaches met criteria for anxiety. Similarly, another study reported that young girls with anxiety disorders were three times more likely to have chronic headaches than those without the disorder. (Headaches in both studies were also strongly associated with depression.)
Respiratory Problems. Studies report an association between anxiety in patients with obstructive lung conditions (asthma, emphysema, and chronic bronchitis) and more frequent relapses.
Obesity. Anxiety disorders may lead to obesity, and the reverse may also be true. A 2006 study suggested that anxiety disorders and depression in childhood may lead to higher body mass index (BMI) in adult women (but not men). Another 2006 study indicated that obesity is associated with a 25% increased risk of developing anxiety and mood disorders.
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