is it normal if 4 month old baby not sleeping at night and sleeps in the morning. how can i change sleep routine of 4 month old

A. Sleep Cycle in smaller babies is very different and they have a certain pattern initially which becomes regularize at around 6 to 8 months of age and if the baby is comfortable with no irritabilityuy because of infantile colic nasal blockauge any regurgitation etc you should not worry just give a comfortable position to the baby and no medicine is required.