![]() American Journal of Respiratory and Critical Care Medicine. Nocturnal Asthma and the Importance of Race/Ethnicity and Genetic Ancestry. Asthma treatment, which typically involves a long-term daily controller/s plus another rescue inhaler for asthma attacks, may need to be adjusted to control nighttime asthma symptoms. ![]() Keeping a rescue medication in easy reach at night, taking steps to control bedroom asthma triggers and discussing nighttime symptoms with a doctor can help improve sleep and stave off nighttime asthma flare-ups. Researchers continue to explore other risk factors that may give rise to nocturnal asthma symptoms. Nocturnal asthma tends to be associated with more severe disease. More than 75 percent of individuals with asthma report nighttime symptoms. Nighttime flares may also be due to poorly controlled asthma by day.Īlone or together, all of these factors can set the stage for nighttime asthma symptoms, including coughing, wheezing and chest tightness that can disrupt sleep.Back sleeping puts extra pressure on the chest and lungs. Some people may also be triggered by mold, pollen or cold air. Exposure to triggers at night such as dust mites in the bedding or mattress, or animal dander if pets sleep in the bed, may trigger nighttime symptoms.Higher levels of blood cells known to promote inflammation, including eosinophils and neutrophils, are present in the blood of individuals with nighttime asthma symptoms.This is known as reduced forced expiratory volume (FEV) rate. Airway function tends to decrease during sleep (and daytime) in people with nocturnal asthma. The tubes that carry air into your lungs and back out again (airways) grow more resistant to air flow during the night due to normal hormonal fluctuations.“Nocturnal asthma” may be due to one or more factors that interact: Exactly why asthma tends to get worse at night is not fully understood, but several theories exist.
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