The problem with worrying over the amount of sleep you're getting is that the worry literally keeps you up at night. Now, there's another study to lose sleep over: a report in Biological Psychiatry claims that chronic insomnia may shrink your brain. The study, which compared 24 subjects with severe insomnia to 13 normal sleepers, links insomnia to less density in the parts of your brain that regulate decision-making and rest, most notably in severe insomniacs. One researcher quoted in the article notes that the findings support other recent research confirming that "bad sleep is bad for the brain at a neurological level, not just the psychiatric level as a nuisance." You know that getting a good night's sleep is part of being healthy; being well-rested helps you lose weight and reduces blood pressure in addition to helping you feel energized throughout the day. If you're having trouble falling asleep, check out some common reasons why and a few reader-tested solutions.