<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been feeling very sleepy during the day, and my mouth feels very dry when I wake up in the morning. What could be wrong with me?  <response>: Based on your symptoms, it sounds like you may be suffering from obstructive sleep apnea OSA. It is a condition that causes your airway to become partially or completely blocked while you are asleep, leading to interrupted breathing and poor quality sleep. 