Lack of sleep is equally harmful as excess of sleep. Sleep deprivation can lead to mental and physical problems that could be avoided with a good sleep.

Eight hours sleep is considered ideal for mind and body. Experts say that some of the people need less eight hours of sleep while others require more than that to stay fit. Sleep problems are mainly caused by worry, uncomfortable beds, a snoring partner and wakeful children.

Getting enough sleep during night makes a person refreshed in the morning and active throughout the day. In addition to the time of sleep, quality of sleep also matter. Sleep apnea can lead to daily stress, tiredness and also the physical and emotional health of a person.

Feeling of tiredness due to lack of sleep can force people to take too much caffeine to wake them or too much alcohol to help them sleep. Dr. Phil Tucker from Swansea University says that it's difficult to sleep during the day time and work in the day time because our bodies have evolved to sleep in the dark. Previous researches have shown that body digests food efficiently at night. Sleeping at night is also good for the general health of body.