In broad terms, insomnia refers to difficulty experienced in falling asleep or maintaining restoring/refreshing sleep. It is a topic of great debate whether insomnia is a symptom or disorder. Whether disorder or symptom, different kinds of insomnia have been recognized and are described here.

Kinds of Insomnia

Sleep Onset Insomnia is also called Delayed Sleep Phase Syndrome because the patient delays the major sleep episode and this delay causes sleeplessness and difficulty in getting up at the desired time. Psycho-Physiological Insomnia is caused due to anxiety or psychological problem which creates physical symptoms and prevents sleep. In Idiopathic type of insomnia, the nervous system becomes incapable of controlling the sleeping and waking mechanism of the body. The result is a lifelong failure to get proper sleep. It usually starts in early childhood.

Childhood insomnia in children is of two types- Limit- Setting Sleep Disorder and Sleep-Onset Association Disorder. Altitude Insomnia is an acute version of insomnia, short-lived but intense, accompanied by symptoms of headache, fatigue, and loss of appetite, all occurring when you move to high altitudes. Insomnia that results as an allergic response to certain foods is called Food Allergy Insomnia. Toxin-Induced Sleep Disorder is insomnia caused due to poisoning with toxins like heavy metals or certain organic compounds. Environmental Insomnia is sleep difficulty caused by the presence of certain environmental factors in the surrounding e.g. noise, smell, smoke etc. Stimulant-Dependent Sleep Disorder is insomnia resulting from using substances (drugs for example) that stimulate the nervous system. The person becomes addicted to their use and fails to get sleep when abstinence from the drug is practiced.

Alcohol and Insomnia

Many people believe that alcohol and insomnia are not related since alcohol actually puts a person to sleep when it is consumed in excess. Yes, it is true that initially a person who consumes large amounts of alcoholic drinks would fall asleep or pass out as it is popularly known. However, if such binges are happening often enough, the effect will be drastically reversed and the person is bound to have a very fitful sleep. People who suffer from diseases such as blood pressure, indigestion and gastric or kidney or heart problems, and the like are prone to develop insomnia if alcohol is introduced in the diet on a regular basis. It would be good to stay away from alcoholic beverages at least 3-4 hours before bedtime

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