Insomnia can cause anxiety and anxiety can cause insomnia. For some people, problems sleeping can either cause or increase symptoms of anxiety. For others, the constant worrying can keep them up at night, creating both increased anxiety and other health problems. It can become a vicious cycle. Insomnia is a sleep disorder. People with insomnia may have trouble falling asleep, staying asleep or may wake up too early each morning. People with insomnia often sleep poorly, even after falling asleep. According to DukeHealth.org, up to 30% of all adults in the United States have symptoms of insomnia at some time and 10% suffer from chronic insomnia. Insomnia can often be one of the first symptoms of anxiety.