Many illnesses are a product of wrong health habits and that includes the lack of good sleep. Whether the reason for lacking sleep is related to the immense work load or just staying up late as much as possible because of Facebook and other online reasons (games or social networking), the fact is if you lack sleep, you are preventing your body to heal itself which happens during sleep. Not nap, but sleep. Actually, deep sleep. If you are half awake then the repair is not happening just the same. Having a memory foam mattress may help to give you good sleep and may be the solution if you are insomniac.