Difficulty falling asleep can be caused by stress, anxiety, poor sleep habits, or medical conditions like insomnia or restless leg syndrome. Symptoms often include lying awake for long periods, feeling restless, waking up frequently during the night, and feeling tired during the day. While occasional sleepless nights are common, chronic difficulty falling asleep can significantly impact your health and quality of life. Proper diagnosis involves discussing your sleep patterns, lifestyle, and conducting sleep studies if necessary.