![]() A lack of sleep causes inflammation in the body and affects lung function, increasing the chance of an asthma attack. Some individuals experience insomnia during pregnancy. The levels of these hormones fluctuate on a nightly basis, which can cause inflammation in the airways, increasing the risk of nocturnal asthma symptoms.Īccording to the American Lung Association (ALA), hormonal changes that occur during pregnancy can also influence asthma symptoms. ![]() Hormones, such as cortisol, epinephrine, and melatonin, all have circadian rhythms, which are the body’s internal 24-hour cycles. While doctors do not fully understand why some people’s asthma worsens at night, some think it may be linked to neurohormonal changes. It is important to note that even if a person does not have PEF variability, they may still have nocturnal asthma. If the difference between the measurements is greater than 15%, the individual likely has nocturnal asthma. However, it is also useful for a person to take their PEF measurements if they wake up during the night. PEF is typically first thing in the morning and again before bed. By using a simple device called a peak expiratory flow (PEF) meter, a person can take measurements of airflow during the day and at night. According to one study, peak lung function occurs at 4 p.m., while minimal lung function occurs at 4 a.m.ĭoctors can determine if someone has nocturnal asthma by looking at their changes in lung function. They may have worsening lung function and increased airway sensitivity.Ī healthy individual’s lung function varies throughout the day. Sometimes, the emergence of nocturnal asthma means a person has severe asthma, or poor control over their symptoms. This can negatively affect sleep quality. ![]() Nocturnal asthma means that a person’s asthma symptoms worsen at night. Even minor triggers and allergens can cause those airways to constrict. Share on Pinterest Rubén Carbó/EyeEm/Getty ImagesĪsthma is a condition that causes continuously inflamed airways.
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