Sleep issues can refer to a variety of conditions, but the most common is apnea, which is a sleep disorder characterized by pauses in breathing during sleep. Apnea is a five-letter word and can be caused by a variety of factors, including obesity, smoking, alcohol consumption, and certain medications. It can lead to serious health problems, such as high blood pressure, heart disease, and stroke. Treatment for apnea usually involves lifestyle changes, such as weight loss, quitting smoking, and avoiding alcohol, as well as the use of a continuous positive airway pressure (CPAP) machine.