cough at night

Why do not cough during the day and cough continuously affect sleep during the night?
Many people experience daytime coughing, non-stop coughing at night, which greatly affects the quality of sleep. This shows that the health encountered some instability.
Why does the disease often become heavy at night?
Most people with colds, asthma, headaches, etc. often experience symptoms that worsen at night. Experts have identified the culprit causing this situation.