text: Common causes to insomnia (sleeplessness) are:\njet lag \nshift work \nwake-sleep pattern disturbances \ngrief \ndepression or major depression \nworry \nanxiety or stress \nexhilaration or excitement \nbed or bedroom not conducive to sleep \nnicotine, alcohol, caffeine, food, or stimulants at bedtime \naging \nexcessive sleep during the day \nexcessive physical or intellectual stimulation at bedtime \noveractive thyroid \nside effect of a new medication \nalcoholism or abruptly stopping alcohol after long-term use \nnot getting enough bright-light exposure during waking hours \nabruptly stopping a medication (such as sleeping pills) \nmedications or illicit "street drugs" (for example, excessive thyroid replacement hormone, amphetamines, caffeine-containing beverages, cocaine, ephedrine, phenylpropanolamine, theophylline derivatives) \nwithdrawal of medications (such as sedatives or hypnotics) \ninterference with sleep by various diseases, including an enlarged prostate (men), cystitis (women), COPD, pain of arthritis, heartburn, and heart or lung problems \nrestless leg syndrome