Question
The newborn at 23 days old has been struggling with restless sleep during the day again, waking up crying and wanting to eat after a short nap. Before, after being fed, they could sleep for 1-3 hours. Since yesterday afternoon, they have only been able to sleep for 30 minutes at most before waking up crying for food.
Answer
Considering your description, on one hand, there is a possibility that the baby may not be getting enough milk. On the other hand, it could be due to calcium deficiency. It is recommended to make sure each feeding is sufficient, to give the baby cod liver oil for digestion to prevent calcium deficiency, and also to pay attention to keeping the abdomen warm.