A month old baby baby sleep is not solid, sleep quality is not very good, it may be a lack of security, because before in the mother’s tummy is a great sense of security, with the mother’s protection, if it is because of such a reason, the mother should be more accompanied, must keep the surrounding environment comfortable and quiet, there may also be because of calcium deficiency, because the child grows faster, the lack of vitamin d3 demand is relatively The reason for this is that you need to take vitamin d3 supplements from 20 days onwards to improve the situation of sleeplessness. This may also be due to a noisy environment or an uncomfortable tummy ache, which requires parents to take the temperature, observe the amount of milk eaten, sleep time, stool and other changes, and then deal with the symptoms.