According to experts, there is no abnormality in the occasional waking up of your baby at night. But if it is a daily habit, then he/she should be taken to a pediatrician because several reasons can work behind it.
Many times, the child falls asleep on your lap and wakes up when he/she is put to bed. This happens because his/her sleep gets distracted due to the lack of comfort in the lab. So, don’t put the baby in your lab to sleep, instead, directly put him/her to bed before sleep.
The Baby’s sleep may get disturbed due to the diaper getting excessively wet. Replace the diaper immediately and let your baby sleep comfortably.
Newborn babies do not understand when they are hungry. So, they often look for their mother’s breast or feeding bottle even in sleep. If they do not get it, they feel discomfort and they may wake up.
If none of the above-mentioned reasons are applicable to your baby then it might be a matter of concern. Your baby might have some physical problems which are creating sleeping disorders. In these circumstances, you should consult with your doctor immediately.