Obstructive sleep apnea (OSA) is one of the worst sleep problems. OSA happens when the muscles in the throat ease too much while you sleep, blocking your airway over and over again. This causes breathing to stop and start, which lowers the amount of oxygen in the blood and makes sleep difficult. High blood pressure, heart disease, stroke, diabetes, and even a higher chance of accidents during the day because of sleepiness are all linked to OSA. OSA can have big effects on your health and quality of life if you don't treat it. Narcolepsy causes people to be sleepy all the time during the day and their muscles may suddenly become weak or paralyzed. REM sleep behavior disorder (RBD) causes people to act out their vivid dreams during REM sleep, which could hurt themselves or their bed partner. To successfully deal with these dangerous sleep problems, you must see a doctor for an evaluation and treatment.