A new study has linked common asthma symptoms like waking up in the middle of the night and shortness of breath to increased levels of stress and anxiety in teens with asthma. In the Henry Ford Hospital study of 38 asthma patients aged 14-17 researchers found that their average scores for stress and anxiety levels were higher than those seen in the general population. Here are 10 asthma triggers you should avoid. Researchers suggest the findings are a red flag for physicians of young asthma patients. Lead author Cathryn Luria said that because these patients may be particularly vulnerable to