Nocturnal asthma is characterized by a worsening of one’s asthma during nighttime hours. Research has shown the human body doesn’t remain constant over a 24 hour period. There are fluctuations in hormone levels (circadian rhythm) during this 24 hour period.

The fluctuations in epinephrine and cortisol levels affect airway hyper-reactivity and bronchospasm. When these levels are at their lowest, around 4 AM, some asthmatics have an increase in their symptoms. When they are at their peak levels, 4 PM, the body is better able to protect itself. Therefore, people tend to have a decrease in symptoms.

Signs and Symptoms

• Worsening of your asthma symptoms at night or when sleeping
• Sudden awakening with cough and /or sneezing
• Shortness of breath at night

Treatment

• May vary depending on the specific cause or causes
• Medication
• Environmental control