My one-year-old son's sleep has been disrupted for a week. He has been sleeping through the night for a long time, but now he is waking up every night.

It is normal for babies to experience changes in their sleep patterns as they grow. Factors such as growth spurts, teething, and illness can disrupt their sleep. It is important for babies to feel secure when falling asleep, so creating a consistent bedtime routine can help. If your baby wakes up during the night, it is best to wait and see if they can settle back to sleep on their own. Gradually helping them learn to self-soothe can also improve their ability to sleep through the night. Consistency is key when establishing good sleep habits for your baby.