What is the reason for a 100-day-old baby crying loudly at night?

Patient's question:

Recently, the baby has been crying suddenly every night, basically crying 3 or 4 times. After comforting him for a while, he falls asleep again. During the day, he mostly sleeps. Last night, he cried again, so I fed him, but after a while, he started crying again, so I fed him again. After feeding him, he stopped crying and fell asleep. However, after repeating this several times, the milk supply became insufficient, and he even vomited once during the night. His hands and feet were very cold at night, and he was sweating profusely. I want to know why he's crying—his behavior wasn't like this before. Today, he's been sleeping all day. When I try to wake him up to feed him, I feel like there isn't much milk, but he still vomits it all up. I'm very frustrated. I'd like to understand the reasons for insufficient milk supply and how to solve the problem! Thank you.

Doctor's answer:

A 100-day-old baby may suddenly cry at night, which is usually due to some calcium deficiency or excessive fright. During deep sleep, it is essential to maintain a quiet environment. It is necessary to digest vitamin D by taking pediatric AD, combined with taking calcium carbonate or calcium acetate. Carefully observe the situation. Additionally, the child must be well-fed. If breastfeeding is insufficient, formula milk can be given. The above suggestions are for the question "100-day-old baby crying at night." I hope it helps you. Wishing you good health!

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