insomnia is when a person is not able to sleep at night or insufficient sleep if a person sleeps less than 5 hours at night. this is generally defined as a sleepless night.

a lot of people experience some degree of insomnia every now and then. According to estimates, More than 30% of people in the developing country suffers from insomnia, insomnia is a chronic problem. There are many reasons why the odd sleepless night(insomnia) may occur.
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