How to Handle a 9-Month-Old Baby’s Poor Night Sleep

The baby is nine months old and has difficulty falling asleep at night and shallow sleep. During the day, he sleeps for over an hour. He doesn’t fall asleep until after midnight and cries as soon as he closes his eyes, despite being extremely tired and having dark circles under his eyes. He still doesn’t take naps during the day. The hospital check for trace elements showed no deficiencies. What could be the cause?
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