Question
Why does my six-and-a-half-month-old baby’s nostrils expand during sleep, and why do they get larger when breathing? What is the cause of this, and have there been any treatments? How effective were they?
Answer
This may be due to poor sleep habits in babies, related to a deficiency of vitamins A and D. It is recommended to let the baby sleep directly in bed and maintain continuous sleep to promote better sleep quality. If vitamin A and D supplements have not been taken, they should be supplemented as soon as possible.