Teething can be a potential cause of sleep regression in babies. As babies begin to develop teeth, they may experience discomfort, pain, and inflammation in their gums. This can make it difficult for them to fall asleep or stay asleep, leading to changes in their sleep patterns. Teething can cause babies to wake more frequently during the night, and have trouble falling back to sleep. Also, drooling, fussiness, and biting are common symptoms of teething, and these may also disrupt sleep.
However, it's important to note that sleep regression can have multiple causes, and teething may not be the only factor. Other common causes of sleep regression include developmental milestones, changes in routine, and illnesses.
It's a good idea to monitor your baby's sleep patterns and teething symptoms, and to keep a diary of when they occur. If your baby's sleep regression is severe or prolonged, or if you have any concerns about their sleep or teething, it's best to consult with a pediatrician. They can help you understand the cause of the sleep regression and provide guidance on how to improve your baby's sleep.