If you have trouble falling asleep on most nights or wake up several times during sleep and feel tired during the day it is time you acknowledge that insomnia is taking its toll on you. Factors like increasing age hormonal changes (eg: thyroid disease) physical ailments or diseases may cause sleeplessness. Any type of physical pain can also preventing you from having a good night's sleep. Regular night-outs or late night parties high amounts of junk food (especially at night) irregular eating sleeping at odd hours working late nights or working the night shift triggers a random response in