Hello doctor My daughter is 1 month old and getting irritated while lying down and unable to sleep properly while lying down can I know the reason

A. Actually when we feed the child in the lying position in the lab they’re very comfortable sleeping that way or otherwise on the shoulder when you put your child to a child but when they’re in sleep and you put them on the back on the bed they are very discomfort and the sleep breaks so always make sure that the child is in the deep sleep on your shoulder and put the child on the bed sideways which would be very helpful and generally keep patting the body of the child