Cranky babies cry and their parents do not feel rested at dawn.

A Lecturer and Consultant Paediatrician at the Infectious Diseases Unit of the University College Hospital (UCH) Ibadan, Dr Babatunde Ogunbosi, says children under 5 are the largest age group being admitted to hospital for sleep disorders.

"The most common cause of their sleep problem is ‘sleep apnoea’, where breathing is interrupted during sleep.

"However, sometimes there is no obvious cause of a child’s sleep problem", he said.

Dr. Ogunbosi advises parents to do to ensure their children get enough sleep.

Here's how:

1.      Study their sleep disorder.

2.      Understand that children and teenagers need at least nine hours of sleep per night.

3.      Establish a regular time for bed each night and should not vary from it.

4.      Waking time should not differ from week days to weekend by more than an hour.

5.      Children should not be given drinks and foods with caffeine less than six hours before bed time.

6.      Ensure noise level in the house is low and avoid giving children large meals close to bed time.

He says sleep problems and lack of sleep can have negative effects on a child’s performance at school.

“It could also affect the child’s extracurricular activities and social relationships," Dr. Ogunbosi  told the News Agency of Nigeria.

According to the paediatrician, accidents and injuries, behavioural problems, mood swings, memory and learning problems, performance problems and slow reaction to issues are often attributed to sleep disorder.