Restless nights. Patients who suffer from asthma cannot manage to have a healthy sleep. They often wake up at nights; it takes a while for them to fall asleep even if they are extremely tired. After midnight, the person may feel the lack of breath and other alarming symptoms. Both classic and cough variant asthmas are supported by the difficulty sleeping.  It happens because of the increased airway resistance and the fact that airway function decrease during the sleep.