Baby is very fat at 4 months and then loses weight after 4 months, what should I do?

Patient's question:

Sure, here is the translation of the content you provided:
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No
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Doctor's answer:

Hello, it may be caused by a lack of vitamins or trace elements. You can take a multivitamin pill or 21 Jinwei for better effect. At the same time, drink more boiled water and eat more vegetables and fruits, which is beneficial for symptom improvement.