An overtired baby is one that has been awake for too long between naps or normal sleep periods or otherwise have not had the amount of sleep they require. When a baby is overtired it stimulates the release of cortisol in their bodies which makes it even harder for them to go to sleep.
It’s important for parents to recognize when their baby has become overtired. Some of the signs of this are the child pulling at its ears, clinging closer to the caregiver, rubbing their eyes and being less social and less engaged with others. They will also tend to fuss more and cry, are difficult to calm, yawn constantly and may be prone to overactivity.
To avoid this parents should not wait too long before initiating sleep periods and not interfere with the process of the baby going to sleep such rocking, holding and bouncing.