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Q: 
Can asthma be caused by emotions, or stress?
A: 
Asthma is not an emotional or psychological disease, although strong emotions such as laughter or crying, and psychological stressors can definitely trigger asthma or make symptoms worse. People with asthma have very sensitive lungs that may react to numerous triggers, causing the airways to tighten, swell and fill with mucus. These factors can then lead to symptoms of difficulty breathing - shortness of breath, a sensation of chest tightness, coughing and wheezing. Regarding stress, a previous study showed that college students with asthma had reductions in lung function the week prior to final exams!