Insomnia, a chronic sleep deprivation disorder, has become a major topic in science over the past 20 years. Currently, a third of the adult population in England is reported having frequent insomnia symptoms. Insomnia often accompanies other health conditions such as diabetes, hypertension, chronic pain, thyroid disease, gastrointestinal problems, anxiety, or depression. Until the early 2000s, scientists argued that insomnia could precede or long survive a primary condition, making it an independent disorder requiring its own treatment. There is strong evidence that helping patients with insomnia can improve their other health issues if they address their sleeping problems. Insonia affects almost everyone, but women, older people, and lower socio-economic status are more vulnerable to it. Researchers have also found that difficulty initiating sleep is associated with an increased risk of depression. There are effective treatments recommended for insomnia, including cognitive treatment for insomnia (CBTI). However, unavailability of treatment options and limited funding funding may be due to unfamiliarity with the treatment program and limited awareness of the treatment.