Insomnia is a symptom, not a disease. It is a persistent and distressing disorder relating to a difficulty with:

Insomnia is usually accompanied by daytime fatigue. Individuals often report lack of energy and irritability. Poor performance at work, memory difficulties and concentration problems are also reported. Insomnia can just be transient and may be caused by stress, anxiety and depression, advanced age, environmental noise, medication side effects, extreme temperatures, sleep/wake schedule problems such as jetlag. Chronic insomnia can be more complex and may arise from more than one reason. Contributing causes to insomnia may include arthritis, kidney disease, heart failure, sleep apnoea, hyperthyroidism, misuse of caffeine and/or alcohol or other substances, shift work and chronic stress. Naturopathic  treatment will heavily depend on the determining the underlying cause and focus on the re-establishment of healthy sleep-wake cycles.