Another sleepless night? If you have difficulty falling or staying asleep at night or staying awake during the day, you may have a sleep disorder. Sleep disorders include insomnia, sleep apnea, narcolepsy and restless legs syndrome (RLS). Your sleep can also be disturbed by sleep walking, nightmares, night terrors, snoring (yours or someone else’s) and periods of apnea, in which you stop breathing for seconds. Your sleep needs and your ability to sleep well can change as you age. Shift work and psychiatric disorders can also disturb sleep. Getting to the cause of your sleep problems is the first step toward a better night’s sleep.