If a 4-month-old baby is not sleeping soundly, you need to observe whether there is any discomfort in other aspects of the baby. For example, first look at how the baby’s milk intake, if the milk intake is not enough, sleep is not solid, and does not sleep, sleep within a short period of time and then wake up, and then by eating milk is possible to calm down, immediately after eating milk and sleep again, if this is the case, then it is to increase the intake of milk. Observe whether the baby has a stuffy nose, the nose does not breathe these conditions, the nose gasping uncomfortable, may breathe through the mouth, and then the throat dry, these uncomfortable, all make sleep is not solid. In addition, observe the baby’s tummy, such as whether there is obvious bloating, tummy rumbling, gurgling, farting more, farts are particularly smelly, this time suggests that there may be tummy pain, appropriate to do a hot compress and clockwise massage of the abdomen, to relieve the tension of the abdomen. In terms of diet, if you are breastfeeding, the mother’s diet should be adjusted appropriately to avoid indigestion in the baby. Also observe if the baby has eczema, see if there is a small rash on the body or face, there may be a body wriggling around, sleep is not good. So you have to observe the baby’s situation from many sides, different causes, different ways to deal with.