My toddler has recently started to wake up in the middle of the night, really suddenly and crying hysterically. He usually sleeps through like a lamb and if he has woken it hasn't seemed as extreme as this. He seems relatively easy to settle back down - a cuddle for five minutes or so and then will go back to sleep. It could be that his last molars are on their way (although I wouldn't have thought he would be so quick to go back to sleep as he had me up all night for his pre-molars!) and it's occurred to me that he might be having nightmares. What do you lot think - and what can I do to lessen the chances of nightmares, if indeed that's the problem?