Insomnia is a condition, not a disease or an illness or anything. Insomnia simply just means you can't sleep, and it could be any one of a hundred things keeping you up.
For some people, it's the constant bathroom trips. If you cut back on your stimulants like caffeine, alcohol, and nicotine, and you drink less water late at night, this isn't too difficult a problem to address.
Maybe the most common cause of insomnia, of being unable to fall asleep when you really wish you could, is stress. Stress and anxiety can manifest themselves in any number of ways. You can find yourself getting sore in places where you did not overexert or sprain anything. You may have trouble focusing on a movie that you're watching, or you could have a hard time talking to new people. Or, of course, you could toss and turn all night, with a hundred things racing through your mind.
Sometimes all you really need to help manage this anxiety is a good, deep massage.
Massages have been shown to help with anxiety and depression and, yes, insomnia because it's not just a technique for treating injured joints and so on. A massage releases all the right chemicals in your brain to help you to sort of ease off the gas, so to speak. To take some of the emotional burdens of everyday life off your shoulders so that you can get into a clearer mind space where you can hop the hurdles as they come, and then simply go home, relax, and get a good night's sleep.