5. Insomnia
Those that suffer from regular bouts of insomnia will probably tell you that it’s a pretty serious problem in its own right and who could blame them? We all need a certain amount of sleep in order to function normally and being deprived of sleep can result in all kinds of problems, including accidents that could result in serious injury or death. The inability to sleep can be an indication of other serious conditions such as depression, asthma, arthritis or even Parkinson’s disease.