UNDERSTAND YOUR CIRCADIAN THE RHYTHM TO GET QUALITY SLEEP IN NIGHT Every activity and internal cycles of your body are controlled by a biological clock. Sleep-wake cycle is a natural phenomenon of the body, which helps people to fall asleep and wake up. Your circadian rhythm controls the sleep-wake cycle and keeps your body and mind in a healthy state. However, due to some factors, circadian rhythm gets unbalanced and people experience sleep problems in their daily routines. Chronic insomnia, anxiety and other neurological disorders are caused by the unbalancing of the internal biological clock. From the last few years, the number of people who buy strong sleeping pills in the UK, Ireland, France and other countries in the world has been increased dramatically.