Sleep disorders develop when an individual lacks the adequate sleep and rest needed to function normally. Examples of some common sleep disorders include insomnia, sleep apnea, narcolepsy, restless legs syndrome, and REM sleep behavior disorder. Insufficient sleep can ultimately cause poor communication, unhealthy decision making, relationships problems, eating disorders, and addiction. Understanding your anxiety, worries, stress and other contributing factors that negatively affect sleep is vital to coping with sleep disorders and obtaining healthier sleep.