Humans spend time sleeping about one-third of a day to take rest their brains.
Insomnia is a syndrome of having an inadequate amount or quality of sleep due to the difficulty of falling asleep, inability to maintain sleep, or suffering from waking up too early and not being able to fall asleep again. When you face difficulty sleeping at least three times a week for three months or more, the symptoms are referred to as insomnia. The situations such as the difficulty of getting sleep, lack of deep sleep, or frequent awake during sleep can affect your daily life, including having fatigue and poor concentration. Currently, it is known that about 30% of the adult population experiences insomnia. In the case of the elderly, 59.6% were found to have sleeping disorders. Lack of sleep and overactivity of sympathetic nerves can cause developing various diseases such as cardiovascular disease, arrhythmia, and hypertension.
Sleep deprivation affects not only physical aspects such as digestive system problems, joint and muscle aches but also physiological and mental problems such as fatigue, anxiety, and tension. Insomnia leads to the insufficient secretion of melatonin which is an important hormone that controls sleep. In the daytime, serotonin is secreted and converted to melatonin at night. Therefore, insomnia causes a lower level of melatonin, which also causes lower serotonin levels. A deficiency of these sleep-related hormones can lead to impulsive behavior, depression, and impaired decision-making.