Sleepless nights happen to everyone. Many scientists and most of the society think of
insomnia as a natural reaction of the organism to tension or noise. The popular opinion is
right. It is natural - this condition is called short-term insomnia or adjustment insomnia
when the sleeplessness is related to stress and anxiety. But as the researches show - the short-term
insomnia can easily transform into a chronic condition. Numerous epidemiological studies
have discovered that about 30% of the world's population, including more than 50% of
people older than 60 and almost 20% of those younger declare sleep disorders. One third of
these cases can be qualified as chronic insomnia