The sudden sitting up and lying down of a seven-month-old baby during sleep may be related to a deficiency in trace elements (including calcium) and vitamin D. It is recommended to check for deficiencies and supplement nutrition.
Newborns typically require about 16 hours of sleep per day, spending most of their time eating and sleeping. Parents should take careful care, closely monitor their child’s condition, and seek medical attention when necessary to ensure that the child’s growth and development are not affected.