Some possible reasons include biological changes that occur at night, such as temperature changes in the body, low circulation of adrenal gland hormones, or gastroesophageal reflux disease. Medicines taken during the day that wear off, postnasal drip while sleeping, or other sleep conditions also may trigger symptoms.
What’s most troubling about nocturnal asthma is that it is often not reported to health care providers. If you do not tell your doctor that you are having symptoms at night, your doctor may think your asthma is under control, and you may not get the treatment you need.
Do you wake up wheezing, coughing, or with trouble breathing? Even if you feel great during the day, take note of any nighttime troubles and share them with your health care provider.